Compare phones
| Global Score | |
| 85.5 | 77.7 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 10 |
| 2019-12-27 | 2020-06-19 |
| 6.24 x 2.90 x 0.31 inches | 6.44 x 2.96 x 0.35 inches |
| 6.07 ounces | 6.77 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Black, Blue, Red and White |
| Plastic and Plastic | -- |
| Scratch-Resistant Glass | -- |
| $ 282.00 | -- |
| Display / Screen | |
| 6.5 inches | 6.5 inches |
| 2400 x 1080 pixels | 1600 x 720 pixels |
| Super AMOLED | TFT |
| 405 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 7.2 |
| Performance | |
| Samsung Exynos 9611 chipset | Samsung Exynos 850 chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Mali-G72 MP3 GPU | Mali-G76 GPU |
| 9.27 | 9.09 |
| Storage | |
| 128 GB internal memory | 32 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 14.14 | 9.84 |
| Camera | |
| 48.00 MP + 32.00 MP | 48.00 MP + 13.00 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 | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | -- |
| 11.55 | 10.78 |
| 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 | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy A51 has a general score of 85.5, which is much better than Samsung Galaxy A21s's score of 77.7. These phones work with Android OS, but Galaxy A51 has 11 version and Samsung Galaxy A21s has Android 10. The Galaxy A51 is a somewhat thinner and somewhat lighter cellphone than Samsung Galaxy A21s, even when both were only released 6 months apart.
The Galaxy A51 counts with a better looking screen than Galaxy A21s, and although they both have a display with the same size, the Galaxy A51 also has a much higher resolution of 1080 x 2400 pixels and more pixels per screen inch. Samsung Galaxy A51 has a way bigger storage to install applications and games than Samsung Galaxy A21s, and although they both have a slot for an external memory card that allows a maximum of 512 GB, the Samsung Galaxy A51 also has 128 GB internal storage capacity.
Galaxy A51 features a bit better hardware performance than Galaxy A21s, and although they both have 8 CPU cores, the Galaxy A51 also has a higher amount of RAM memory. Galaxy A51 counts with a little bit better camera than Samsung Galaxy A21s, and although they both have a same size sensor, the same resolution back camera and a same size aperture, the Galaxy A51 also has a much higher 3840x2160 (4K) video resolution.
The Samsung Galaxy A21s has better battery duration than Galaxy A51, because it has a 25 percent greater battery capacity.
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