Compare phones
| Global Score | |
| 84.1 | 86.5 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 11, 10 |
| 2020-03-23 | 2020-03-05 |
| 6.26 x 2.96 x 0.35 inches | 6.27 x 2.96 x 0.35 inches |
| 6.63 ounces | 6.74 ounces |
| Midnight blue and Raven black | Black, Blue and Red |
| Plastic and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 6.4 inches |
| 2340 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 403 pixels per inch |
| 420 cd/m2 brightness | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.4 | 8.4 |
| Performance | |
| Exynos 9611 chipset | 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 | 6 GB RAM |
| Mali-G72 MP3 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.36 |
| Storage | |
| 64 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.74 | 11.74 |
| Camera | |
| 48.00 MP + 20.00 MP | 64.00 MP + 32.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.59 inches (1/1.7") 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 | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11.55 | 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, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 7.52 |
| 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 M31 is a bit better than Galaxy M21, having an 86.5 score against 84.1. Both phones in this comparison work with the same Android 11 OS (operating system), so both of them should offer the same OS features. The Galaxy M31 construction has the same thickness than the Galaxy M21, but it is a bit heavier.
The Galaxy M31 has a little better performance than Galaxy M21, and although they both have the same number of cores, the Galaxy M31 also has a larger amount of RAM. Samsung Galaxy M31 features a display that is just as good as the Galaxy M21 one, both of them have a screen with the same size, the same brightness, a greater pixel quantity in each inch of display and the same exact resolution of 1080 x 2340 pixels.
The Galaxy M31 has a little bit better camera than Samsung Galaxy M21, and although they both have the same (4K) video resolution and the same video frame rates, the Galaxy M31 also has a bigger back-facing camera sensor taking better quality videos and photographs, a way more mega-pixels camera and a larger aperture for better low light photos.
Galaxy M31 and Galaxy M21 count with quite similar storage to install games and applications, both of them have exactly the same internal storage capacity and an external memory slot that supports up to 512 GB. Galaxy M31 and Galaxy M21 feature really similar batteries performance.
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