Compare phones
| Global Score | |
| 85.5 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 11, 10 |
| 2019-12-27 | 2020-03-23 |
| 6.24 x 2.90 x 0.31 inches | 6.26 x 2.96 x 0.35 inches |
| 6.07 ounces | 6.63 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Midnight blue and Raven black |
| Plastic and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 282.00 | -- |
| Display / Screen | |
| 6.5 inches | 6.4 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 405 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 8.4 |
| Performance | |
| Samsung Exynos 9611 chipset | Exynos 9611 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 14.14 | 11.74 |
| Camera | |
| 48.00 MP + 32.00 MP | 48.00 MP + 20.00 MP |
| f/2.00 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11.55 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy A51 has a score of 85.5, which is slightly better than the Galaxy M21's overall score of 84.1. These phones work with the same Android 11 operating system. The Galaxy A51 construction is somewhat thinner and a little lighter than Galaxy M21, although they were only released with a few months difference.
Galaxy M21 and Samsung Galaxy A51 have incredibly similar CPUs, both of them have a Octa-Core CPU and a 4 GB RAM memory. The Samsung Galaxy M21 counts with just a bit better looking screen than Galaxy A51, although it has a little bit smaller display, a just a little less pixels per inch of display and a little bit lower resolution of 1080 x 2340.
Samsung Galaxy A51 counts with a way bigger memory for games and applications than Samsung Galaxy M21, and although they both have a SD card slot that holds a maximum of 512 GB, the Samsung Galaxy A51 also has 64 GB more internal memory. The Galaxy A51 and the Samsung Galaxy M21 have similar cameras, they have a F2 diafragm aperture, the same video frame rate, a 0.5 inches sensor, the same video quality and the same resolution camera.
Samsung Galaxy M21 features a very superior battery performance than Galaxy A51, because it has a 6000mAh battery capacity.
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