Compare phones
| Global Score | |
| 84.1 | 81.3 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 10 |
| 2020-03-23 | 2020-04-27 |
| 6.26 x 2.96 x 0.35 inches | 6.27 x 2.88 x 0.34 inches |
| 6.63 ounces | 6.53 ounces |
| Midnight blue and Raven black | Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white |
| Plastic and Plastic | Plastic |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.4 inches | 6.4 inches |
| 2340 x 1080 pixels | 2400 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 411 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8.1 |
| Performance | |
| Exynos 9611 chipset | MediaTek Helio P65 MT6768 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Mali-G52 MC2 GPU |
| 9.27 | 9.09 |
| 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 | 48.00 MP + 20.00 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 |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 11.55 | 10.89 |
| 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 | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 6.8 |
| 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 | -- |
Comparison review
The Galaxy M21 is just a bit better than Samsung Galaxy A31, getting an 84.1 score against 81.3. These devices include Android OS (Operating System), but Galaxy M21 has a more recent 11 version and Samsung Galaxy A31 has Android 10. Even being the best phone we compare here, it must be told that it is also a bit thicker and a little bit heavier.
The Samsung Galaxy M21 features a bit better display than Galaxy A31, although it has a quite lower resolution of 1080 x 2340 pixels and a quite inferior amount of pixels per inch in the display, they both have a screen of the same size. The Galaxy A31 counts with as much storage capacity to install applications and games as Samsung Galaxy M21, they have an external memory slot that allows a maximum of 512 GB and exactly the same 64 GB internal memory.
Galaxy M21 counts with just a little better hardware performance than Samsung Galaxy A31. Both have 4 GB of RAM memory and 8 CPU cores. The Galaxy M21 counts with superior battery life than Samsung Galaxy A31, because it has 6000mAh of battery capacity against 5000mAh. Galaxy M21 has just a bit better camera than Galaxy A31, and although they both have a same size aperture, a same resolution back camera and the same camera sensor size, the Galaxy M21 also has a way higher (4K) video quality.
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