Compare phones
| Global Score | |
| 76.1 | 86.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 10 | Android 11, 10 |
| 2020-06-29 | 2020-03-05 |
| 6.61 x 3.02 x 0.32 inches | 6.27 x 2.96 x 0.35 inches |
| 6.81 ounces | 6.74 ounces |
| Black | Black, Blue and Red |
| Plastic and Plastic | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| $ 194.00 | -- |
| Display / Screen | |
| 6.5 inches | 6.4 inches |
| 1600 x 720 pixels | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 270 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.3 | 8.4 |
| Performance | |
| Mediatek Helio P35 chipset | Exynos 9611 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB RAM | 6 GB RAM |
| PowerVR GE8320 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.36 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 9.84 | 11.74 |
| Camera | |
| 16.00 MP + 13.00 MP | 64.00 MP + 32.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| -- | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.59 inches (1/1.7") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 9.35 | 12.1 |
| 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 | 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 | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Samsung Galaxy M31 is better than the Galaxy A21, having a general score of 86.5 against 76.1. Both of these devices use Android OS (operating system), but Samsung Galaxy M31 has newer 11 version and Galaxy A21 has Android 10 version. Samsung Galaxy M31's construction is just a bit lighter but just a bit thicker than the Galaxy A21, and both of them were released with only 4 months difference.
The Samsung Galaxy M31 has just a bit better performance than Galaxy A21, and although they both have a Octa-Core CPU, the Samsung Galaxy M31 also has more RAM memory. The Samsung Galaxy M31 has a sharper display than Galaxy A21, because although it has a little smaller screen, it also counts with a lot better 1080 x 2340 resolution and more pixels per inch of display.
Galaxy M31 takes greater pictures and videos than Galaxy A21, and although they both have a F1.8 aperture, the Galaxy M31 also has a back camera with a way higher resolution, a much higher video resolution and a way larger back camera sensor providing a much better image quality. The Samsung Galaxy M31 features a better storage to install applications and games than Galaxy A21, and although they both have a SD card slot that supports a maximum of 512 GB, the Samsung Galaxy M31 also has 64 GB internal memory capacity.
The Samsung Galaxy M31 has a much longer battery lifetime than Galaxy A21, because it has a 6000mAh battery capacity.
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