Asus Zenfone 9 vs Samsung Galaxy A51 5G – Detailed Smartphone Comparison

The official name of the smartphone model.

The manufacturer or company that produces the smartphone.

The software platform that runs on the device. Higher version numbers typically indicate more recent and feature-rich software.

The date when the smartphone was officially released to the market. More recent releases often feature newer technology.

The current market price of the device. Lower prices offer better value for money, but consider all specifications when making a decision.

The physical size of the device (height × width × thickness). Smaller dimensions generally mean better portability.

The weight of the device in grams. Lower weight improves comfort during extended use.

The materials used in the construction of the device. Different materials offer varying levels of durability and premium feel.

The type and number of SIM cards the device can accommodate. Dual SIM capability allows using two phone numbers.

The type of display technology used in the screen. Different technologies offer varying levels of color accuracy, contrast, and power efficiency.

The diagonal size of the screen measured in inches. Larger displays provide more viewing area but may affect device portability.

The number of pixels displayed on the screen (width × height). Higher resolution means sharper and more detailed images.

The number of times the screen updates per second (Hz). Higher refresh rates result in smoother animations and scrolling.

The maximum brightness level of the display measured in nits. Higher brightness improves outdoor visibility and HDR content quality.

The number of pixels per inch (PPI). Higher pixel density results in sharper images and text.

The percentage of the front face of the phone that is occupied by the display. Higher ratio means smaller bezels and more screen space.

The ratio of the display's width to its height. Different aspect ratios affect how content is displayed and how the phone feels in hand.

The type of protective glass or coating used to protect the display from scratches and impacts.

Comparison is based on multiple factors including sensor size, aperture, resolution, optical stabilization, and special features. Note that newer phones typically offer better image quality due to advanced processing technologies, even with similar specifications.

Video recording capabilities including maximum resolution, frame rates, and stabilization features. Higher resolution and frame rates generally indicate better video quality. Newer devices often provide superior video processing and stabilization technology.

Comparison is based on multiple factors including sensor size, aperture (f-number), resolution, and additional features. Release date plays a significant role as newer phones typically feature improved image processing and AI-enhanced photography.

Score is calculated based on maximum resolution (4K = 2160p) multiplied by maximum FPS. Higher resolution and FPS means better video quality.

Comparison is based on the chip manufacturing process. A smaller number (e.g., 4nm vs 6nm) means a more modern and efficient chip.

Score is calculated from the number of cores, their frequency, and generation (A7xx = 2x weight, A5xx = 1x weight). Example: 2x3.0GHz A715 = (2 * 3.0 * 2) = 12 points

The graphics processing unit responsible for rendering graphics and handling visual tasks. Different GPU models offer varying levels of performance for gaming and graphics-intensive applications.

Random Access Memory determines how many apps can run simultaneously. More RAM generally means better multitasking performance and smoother app operation.

Internal storage capacity for apps, media, and files. Higher storage allows you to store more content without relying on cloud storage.

AnTuTu benchmark score (v9). Higher numbers indicate better performance.

AnTuTu benchmark score (v8). Higher numbers indicate better performance.

GeekBench benchmark score (v5.1). Higher numbers indicate better performance.

The battery size in milliampere-hours (mAh). Higher capacity typically means longer battery life between charges.

Charging capabilities including wattage and charging times. Higher wattage and faster charging times are better.

Results from standardized battery life tests including endurance ratings. Higher values indicate better battery performance.

The cellular network technologies supported by the device. More advanced technologies (5G, 4G) offer faster data speeds and better connectivity.

Legacy cellular network frequencies. Important for basic calls and texts in areas with limited coverage.

Third-generation cellular network frequencies. Provides basic data connectivity and improved voice quality.

Fourth-generation cellular network frequencies. Enables high-speed mobile internet and HD voice calls.

Fifth-generation cellular network frequencies. Provides ultra-fast data speeds and low latency for advanced applications.

Maximum theoretical data transfer speeds. Higher speeds enable faster downloads, streaming, and web browsing.

The built-in speaker system. Features like stereo speakers or special audio enhancements improve sound quality for media playback.

Traditional headphone port. Allows connection of standard wired headphones without requiring an adapter.

Wi-Fi capabilities. Newer standards like Wi-Fi 6 (ax) offer faster speeds and better performance in crowded networks.

Wireless connectivity for accessories. Higher versions offer better range, speed, and audio quality for wireless devices.

Location services support. Multiple satellite systems (GPS, GLONASS, etc.) improve accuracy and coverage for navigation.

Near Field Communication for contactless payments and quick device pairing. Essential for mobile payments and smart accessories.

FM radio capability. Allows listening to local radio stations, often requiring wired headphones as an antenna.

USB port type and features. Modern USB-C ports offer faster data transfer, charging, and video output capabilities.

Built-in sensors for various functions. Includes fingerprint reader, accelerometer, gyroscope, and others for security and user experience features.