Compare phones
| Global Score | |
| 79.2 | 84.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11, 10, 9.0 Pie | Android 11, 10 |
| 2019-07-24 | 2020-03-23 |
| 6.04 x 2.83 x 0.33 inches | 6.26 x 2.96 x 0.35 inches |
| 6.13 ounces | 6.63 ounces |
| Blue, Gray and White | Midnight blue and Raven black |
| Glass (Corning Gorilla Glass 5) and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.1 inches | 6.4 inches |
| 1560 x 720 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 282 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.3 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 665 chipset | Exynos 9611 chipset |
| Kryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Adreno 610 GPU | Mali-G72 MP3 GPU |
| 9.09 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 13.18 | 11.74 |
| Camera | |
| 48.00 MP + 32.00 MP | 48.00 MP + 20.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| -- | 26.00mm focal length |
| 0.43 inches (1/2.3") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 11.44 | 11.55 |
| 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 | |
| 4030mAh 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 |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy M21 has a score of 84.1, which is just a bit better than the Xiaomi Mi A3's 79.2 general score. Both phones in our current comparison have the same Android 11 OS (Operating System), so you shouldn't perceive any difference regarding operating system features. Even being the best we are comparing, the Galaxy M21 is an a little thicker and just a little bit heavier phone than Xiaomi Mi A3.
The Samsung Galaxy M21 features a little bit better performance than Xiaomi Mi A3. Both of them have the same RAM amount and 8 cpu cores. Galaxy M21 features a sharper screen than Xiaomi Mi A3, because it has a better display pixels density, a little bit bigger display and a way better 1080 x 2340 resolution.
The Xiaomi Mi A3 counts with a bigger storage capacity for applications, games, photos and videos than Samsung Galaxy M21, because although it has a slot for an SD memory card that holds up to 256 GB against 512 GB, it also counts with more internal storage. The Galaxy M21 shoots a little bit better photos and videos than Xiaomi Mi A3, because although it has a tinier diafragm aperture which is worse for capturing photographs or videos in low light environments, and they both have the same (4K) video definition, the same 30 fps video frame rate and the same resolution camera in the back, the Galaxy M21 also counts with a larger sensor.
Samsung Galaxy M21 counts with a very superior battery duration than Xiaomi Mi A3, because it has a 6000mAh battery capacity.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.