Compare phones
| Global Score | |
| 84.1 | 85.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 11, 10 |
| 2020-03-23 | 2019-12-27 |
| 6.26 x 2.96 x 0.35 inches | 6.24 x 2.90 x 0.31 inches |
| 6.63 ounces | 6.07 ounces |
| Midnight blue and Raven black | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| Plastic and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 282.00 |
| Display / Screen | |
| 6.4 inches | 6.5 inches |
| 2340 x 1080 pixels | 2400 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 405 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8.1 |
| Performance | |
| Exynos 9611 chipset | Samsung 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 | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.74 | 14.14 |
| Camera | |
| 48.00 MP + 20.00 MP | 48.00 MP + 32.00 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 |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1280 x 720 (240 fps) (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 | |
| 6000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Galaxy A51 is slightly better than the Samsung Galaxy M21, getting a score of 85.5 against 84.1. Both of these devices come with the same Android 11 operating system, so you shouldn't perceive any difference regarding that. Although the Galaxy A51 and Samsung Galaxy M21 were released with only a couple of months difference, the Galaxy A51 is a bit lighter and somewhat thinner.
Samsung Galaxy A51 and Samsung Galaxy M21 both count with similar CPUs, they have the same number of cores and 4 GB of RAM memory. Galaxy M21 counts with a little more vivid display than Samsung Galaxy A51, although it has a quite smaller screen, a quite lower amount of pixels per screen inch and a little worse 1080 x 2340 resolution.
Galaxy A51's camera is just as good as Galaxy M21's camera, they have the same 30 fps video frame rates, the same video quality, a 0.5 inches sensor, a same resolution camera in the back and a F2 camera aperture. Galaxy A51 features a superior memory capacity for games and applications than Samsung Galaxy M21, and although they both have a slot for an SD memory card that admits up to 512 GB, the Galaxy A51 also has 128 GB internal storage capacity.
Samsung Galaxy M21 counts with a way better battery life than Galaxy A51, because it has a 50 percent greater battery capacity.
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