Compare phones
| Global Score | |
| 77.7 | 85.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 11, 10 |
| 2020-06-19 | 2019-12-27 |
| 6.44 x 2.96 x 0.35 inches | 6.24 x 2.90 x 0.31 inches |
| 6.77 ounces | 6.07 ounces |
| Black, Blue, Red and White | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| -- | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 282.00 |
| Display / Screen | |
| 6.5 inches | 6.5 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| TFT | Super AMOLED |
| 270 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 7.2 | 8.1 |
| Performance | |
| Samsung Exynos 850 chipset | Samsung Exynos 9611 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 4 GB RAM |
| Mali-G76 GPU | Mali-G72 MP3 GPU |
| 9.09 | 9.27 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.84 | 14.14 |
| Camera | |
| 48.00 MP + 13.00 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 |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1280 x 720 (240 fps) (HD) slow motion video |
| 10.78 | 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 | |
| 5000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 6.8 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy A51 has a general score of 85.5, which is better than Galaxy A21s's global score of 77.7. Both of these devices use Android operating system, but Galaxy A51 has newer 11 version and Galaxy A21s has Android 10. Galaxy A51 is a thinner and somewhat lighter phone than the Galaxy A21s, even though both of them were released with only 6 months difference.
Galaxy A51 has a much better looking screen than Samsung Galaxy A21s, and although they both have a display with the same size, the Galaxy A51 also has a greater pixels density and a lot better resolution of 1080 x 2400 pixels. The Galaxy A51 features a much bigger memory to store more games and applications than Galaxy A21s, and although they both have a SD card slot that holds up to 512 GB, the Galaxy A51 also has 96 GB more internal memory capacity.
Galaxy A51 counts with just a little better performance than Samsung Galaxy A21s, and although they both have 8 cores, the Galaxy A51 also has a larger amount of RAM. Galaxy A51 captures a bit better photographs and videos than Samsung Galaxy A21s, and although they both have a same size aperture, the same sensor size and a same resolution back-facing camera, the Galaxy A51 also has a lot better 3840x2160 video quality.
Galaxy A21s has superior battery duration than Samsung Galaxy A51, because it has a 25% bigger battery size.
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