Compare phones
| Global Score | |
| 91.8 | 81.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 11 | Android 10 |
| 2021-01-29 | 2020-04-27 |
| 5.97 x 2.80 x 0.31 inches | 6.27 x 2.88 x 0.34 inches |
| 6.03 ounces | 6.53 ounces |
| Gray, Phantom pink, Violet and White | Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white |
| Aluminum and Plastic | Plastic |
| Scratch-Resistant Glass | -- |
| $ 722.00 | -- |
| Display / Screen | |
| 6.2 inches | 6.4 inches |
| 2400 x 1080 pixels | 2400 x 1080 pixels |
| Dynamic AMOLED | Super AMOLED |
| 424 pixels per inch | 411 pixels per inch |
| 1300 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.2 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | MediaTek Helio P65 MT6768 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 8 GB RAM | 4 GB RAM |
| Adreno 660 GPU | Mali-G52 MC2 GPU |
| 9.63 | 9.09 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 11.74 |
| Camera | |
| 12.00 MP + 10.00 MP | 48.00 MP + 20.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.57 inches (1/1.76") sensor | 0.5 inches (1/2") sensor |
| 7680 x 4320 (24 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 10.78 | 10.89 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Galaxy S21 has an overall score of 91.8, which is much better than the Galaxy A31's general score of 81.3. Galaxy S21's construction is newer, just a bit thinner and just a little bit lighter than the Galaxy A31. Both phones in this comparison work with Android OS (Operating System), but the Galaxy S21 has newer 11 version while Galaxy A31 has Android 10 version.
Galaxy S21 counts with a bit superior processor than Samsung Galaxy A31, and although they both have 8 processing cores, the Galaxy S21 also has more RAM memory. The Samsung Galaxy S21 has a better looking screen than Galaxy A31, because although it has a bit smaller display, and they both have exactly the same resolution of 1080 x 2400 pixels, the Samsung Galaxy S21 also counts with a just a little better amount of pixels in each inch of screen.
The Galaxy A31 takes just a bit better videos and photos than Galaxy S21, because although it has a tinier sensor shooting lower quality pictures and a tinier camera aperture which is not recommended for shooting images or videos in low light situations, and they both have the same 1920x1080 (Full HD) video definition, the Galaxy A31 also counts with a lot more mega pixels camera and better video frame rate.
The Galaxy A31 has more memory capacity to install games and applications than Samsung Galaxy S21, because although it has only 64 GB internal memory capacity, it also counts with a SD card slot that holds up to 512 GB. The Galaxy A31 has improved battery life than Samsung Galaxy S21, because it has a 5000mAh battery size against 4000mAh.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.