Some of the main features and performance criteria for comparing iPhone and Samsung devices are:
Display: The size, resolution, refresh rate, and brightness of the screen affect the user experience and battery life of the device. Samsung devices tend to have larger and sharper displays than iPhone devices, but iPhone devices have higher peak brightness and adaptive refresh rates.
Processor: The speed, efficiency, and performance of the processor determine how fast and smooth the device can run various tasks and applications. iPhone devices use Apple’s own A-series chips, which are widely regarded as the most powerful and advanced processors in the market. Samsung devices use either Qualcomm’s Snapdragon chips or Samsung’s own Exynos chips, depending on the region. Snapdragon chips are generally faster and more efficient than Exynos chips, but both are inferior to Apple’s chips in terms of performance.
Storage: The amount and type of internal storage affect how much data and files the device can store and how fast it can access them. iPhone devices offer 128GB, 256GB, or 512GB of internal storage, depending on the model. Samsung devices offer the same storage options, but also have the option of expanding the storage with a microSD card slot, which iPhone devices lack.
RAM: The amount of random access memory (RAM) affects how well the device can multitask and run multiple applications at the same time. Samsung devices tend to have more RAM than iPhone devices, ranging from 6GB to 16GB, depending on the model. iPhone devices have 4GB or 6GB of RAM, depending on the model. However, iPhone devices are more efficient at managing RAM than Samsung devices, so the difference in RAM may not translate to a significant difference in performance.
Battery: The capacity, charging speed, and wireless charging support of the battery affect how long the device can last on a single charge and how convenient it is to recharge it. Samsung devices have larger battery capacities than iPhone devices, ranging from 4,000mAh to 5,000mAh, depending on the model. iPhone devices have smaller battery capacities, ranging from 2,815mAh to 3,687mAh, depending on the model. However, iPhone devices are more optimized for battery life than Samsung devices, so the difference in battery capacity may not translate to a significant difference in battery life. Both iPhone and Samsung devices support fast charging and wireless charging, but Samsung devices have faster charging speeds and more wireless charging options than iPhone devices.
Camera: The number, quality, and features of the rear and front cameras affect how well the device can capture photos and videos in various scenarios and modes. Samsung devices have more rear cameras than iPhone devices, ranging from three to five, depending on the model. iPhone devices have two or three rear cameras, depending on the model. Samsung devices have higher megapixel counts and more zoom capabilities than iPhone devices, but iPhone devices have better image processing and video stabilization than Samsung devices. Both iPhone and Samsung devices have similar front cameras, with 10MP or 12MP sensors and various selfie modes.
Design: The size, weight, shape, material, and color of the device affect how it looks and feels in the hand and in the pocket. Samsung devices have more variety in design than iPhone devices, with different sizes, shapes, materials, and colors to choose from. iPhone devices have a more consistent and minimalist design, with rounded corners, glass backs, and metal frames. Samsung devices have more curved edges, plastic backs, and metal or plastic frames. Both iPhone and Samsung devices have water and dust resistance, but Samsung devices have higher IP ratings than iPhone devices.
Ecosystem: The compatibility, functionality, and security of the device with other devices, services, and platforms affect how well the device can integrate with the user’s lifestyle and preferences. iPhone devices are part of Apple’s ecosystem, which includes other devices like MacBooks, iPads, Apple Watches, AirPods, and Apple TVs, as well as services like iCloud, iMessage, FaceTime, Apple Music, Apple TV+, and Apple Pay. Samsung devices are part of Samsung’s ecosystem, which includes other devices like Galaxy Tabs, Galaxy Watches, Galaxy Buds, and Galaxy TVs, as well as services like Samsung Cloud, Samsung Pay, Samsung Health, and Samsung SmartThings. Both iPhone and Samsung devices are also compatible with Google’s ecosystem, which includes services like Gmail, Google Drive, Google Photos, Google Maps, Google Assistant, and Google Play. iPhone devices are more secure and private than Samsung devices, as they use Face ID, Touch ID, and encryption to protect the user’s data and identity. Samsung devices use fingerprint, iris, or face recognition, and encryption to protect the user’s data and identity, but they are more vulnerable to hacking and malware than iPhone devices.

The answer to this question may depend on the user’s personal taste and preference, as design is a subjective matter. However, some possible criteria for comparing the design of iPhone and Samsung devices are:
Size and weight: Samsung devices are generally larger and heavier than iPhone devices, which may make them more difficult to hold and carry. iPhone devices are generally smaller and lighter than Samsung devices, which may make them more comfortable and convenient to use.
Shape and material: Samsung devices have more variety in shape and material than iPhone devices, which may make them more appealing and distinctive. iPhone devices have a more consistent and minimalist shape and material, which may make them more elegant and refined.
Color and finish: Samsung devices have more options in color and finish than iPhone devices, which may make them more colorful and vibrant. iPhone devices have fewer options in color and finish, which may make them more classic and subtle.
Water and dust resistance: Samsung devices have higher IP ratings than iPhone devices, which may make them more durable and reliable in harsh environments. iPhone devices have lower IP ratings than Samsung devices, which may make them more prone to damage and malfunction in wet and dusty conditions.

The answer to this question may depend on the user’s photography skills and preferences, as camera quality is not only determined by the hardware, but also by the software and the user. However, some possible criteria for comparing the camera of iPhone and Samsung devices are:
Rear camera: Samsung devices have more rear cameras than iPhone devices, which may make them more versatile and flexible in capturing different scenes and modes. iPhone devices have fewer rear cameras than Samsung devices, but they have better image processing and video stabilization, which may make them more consistent and smooth in producing high-quality photos and videos.
Front camera: Both iPhone and Samsung devices have similar front cameras, with 10MP or 12MP sensors and various selfie modes. However, iPhone devices have the advantage of Face ID, which can create more realistic and accurate facial animations and effects. Samsung devices have the disadvantage of having a hole-punch cutout in the screen, which may interfere with the user’s view and composition.
Zoom and night mode: Samsung devices have higher megapixel counts and more zoom capabilities than iPhone devices, which may make them more capable of capturing distant and detailed objects. iPhone devices have lower megapixel counts and less zoom capabilities than Samsung devices, but they have better night mode and low-light performance, which may make them more effective in capturing dark and dim scenes.

The answer to this question may depend on the user’s usage habits and preferences, as battery life is not only determined by the capacity, but also by the optimization and the user. However, some possible criteria for comparing the battery of iPhone and Samsung devices are:
Capacity and life: Samsung devices have larger battery capacities than iPhone devices, which may make them last longer on a single charge. iPhone devices have smaller battery capacities than Samsung devices, but they are more optimized for battery life, which may make them more efficient and economical in using power.
Charging speed and options: Samsung devices have faster charging speeds and more wireless charging options than iPhone devices, which may make them more convenient and flexible in recharging. iPhone devices have slower charging speeds and fewer wireless charging options than Samsung devices, but they have more compatible and accessible chargers, which may make them more available and universal in finding power sources.

This question may depend on the user’s personal preference and needs, as software is a subjective matter. However, some possible criteria for comparing the software of iPhone and Samsung devices are:
Operating system: iPhone devices run on iOS, a closed and proprietary operating system developed by Apple. Samsung devices run on Android, an open and customizable operating system developed by Google. iOS is known for its simplicity, stability, and security, but it also limits the user’s ability to customize and tweak the system. Android is known for its flexibility, variety, and innovation, but it also exposes the user to more risks and fragmentation.
User interface: iPhone devices have a consistent and intuitive user interface, with a grid of icons, a dock, and a swipe-down control center. Samsung devices have a diverse and adaptable user interface, with different launchers, widgets, themes, and a swipe-up app drawer. iPhone devices have a gesture-based navigation system, with a swipe-up home gesture and a swipe-down back gesture. Samsung devices have a choice between a gesture-based or a button-based navigation system, with a swipe-up or a tap for home, back, and recent apps.
App store: iPhone devices have access to the Apple App Store, which has over 1.96 million apps as of 2021. Samsung devices have access to the Google Play Store, which has over 3.04 million apps as of 2021. The Apple App Store has stricter quality and security standards than the Google Play Store, but it also has fewer choices and options. The Google Play Store has more variety and diversity than the Apple App Store, but it also has more malware and low-quality apps.
Updates: iPhone devices receive regular and timely updates from Apple, which ensure the latest features, security patches, and bug fixes. Samsung devices receive delayed and inconsistent updates from Samsung, which depend on the device model, region, and carrier. iPhone devices have a longer support cycle than Samsung devices, with some models receiving up to six years of updates. Samsung devices have a shorter support cycle than iPhone devices, with some models receiving up to four years of updates.

Generally speaking, iPhones running the latest version of iOS are considered to be more secure than Samsung phones running the latest version of Android, due to the tighter restrictions on app installation and security updates. However, some possible criteria for comparing the security of iPhone and Samsung devices are:
Encryption: Both iPhone and Samsung devices use encryption to protect the user’s data and privacy. iPhone devices use Face ID, Touch ID, or a passcode to encrypt and decrypt the device’s storage. Samsung devices use fingerprint, iris, or face recognition, or a password to encrypt and decrypt the device’s storage. However, iPhone devices have a more secure encryption method than Samsung devices, as they use a dedicated hardware chip called the Secure Enclave to store and process the encryption keys. Samsung devices use a software-based encryption method, which is more vulnerable to hacking and malware.
Biometrics: Both iPhone and Samsung devices use biometric authentication to unlock the device and authorize payments. iPhone devices use Face ID or Touch ID, which are based on 3D facial recognition or capacitive fingerprint scanning. Samsung devices use fingerprint, iris, or face recognition, which are based on ultrasonic, optical, or 2D facial recognition. However, iPhone devices have a more accurate and reliable biometric authentication than Samsung devices, as they use more advanced and sophisticated sensors and algorithms. Samsung devices have a less accurate and reliable biometric authentication than iPhone devices, as they use less advanced and sophisticated sensors and algorithms.
Malware: Both iPhone and Samsung devices are susceptible to malware attacks, which can compromise the user’s data and privacy. However, iPhone devices have a lower risk of malware infection than Samsung devices, as they only allow apps from the Apple App Store, which has strict quality and security standards. Samsung devices have a higher risk of malware infection than iPhone devices, as they allow apps from the Google Play Store, which has less strict quality and security standards, and from other sources, which may be malicious or unverified.
Privacy: Both iPhone and Samsung devices collect and share the user’s data with third parties, such as app developers, advertisers, and service providers. However, iPhone devices have a higher level of privacy protection than Samsung devices, as they give the user more control and transparency over their data. iPhone devices have features like App Tracking Transparency, Privacy Labels, and Sign in with Apple, which let the user limit or monitor how their data is used and shared. Samsung devices have less features and options to protect the user’s privacy, and they may share more data with Google and Samsung than iPhone devices do with Apple.

According to the American Customer Satisfaction Index (ACSI), iPhone devices have a higher customer satisfaction than Samsung devices, as of 2023. iPhone devices scored 81 out of 100, while Samsung devices scored 80 out of 100. The ACSI measures customer satisfaction based on 10 criteria, such as design, performance, features, reliability, and value. However, customer satisfaction may vary depending on the specific model, region, and survey method. According to some other sources, Samsung devices have a higher customer satisfaction than iPhone devices, or at least some Samsung models have a higher customer satisfaction than some iPhone models. Customer satisfaction is also a subjective matter, as it depends on the user’s expectations, preferences, and experiences.