Compare phones
| Global Score | |
| 84.1 | 78 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | -- |
| 2020-03-23 | 2018-07-27 |
| 6.26 x 2.96 x 0.35 inches | 6.25 x 2.97 x 0.29 inches |
| 6.63 ounces | 5.93 ounces |
| Midnight blue and Raven black | Black, Blue, Gold, Pink and Red |
| Plastic and Plastic | Aluminum |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 6 inches |
| 2340 x 1080 pixels | 2160 x 1080 pixels |
| Super AMOLED | IPS LCD |
| 403 pixels per inch | 402 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8.1 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 660 SDM660 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| Mali-G72 MP3 GPU | Adreno 512 GPU |
| 9.27 | 9.27 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 10.1 |
| Camera | |
| 48.00 MP + 20.00 MP | 12.00 MP + 20.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.34 inches (1/2.9") 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 | 1280 x 720 (120 fps) (HD) slow motion video |
| 11.55 | 9.79 |
| 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 and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.3 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3010mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 4.96 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | Infra-red port |
| 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 M21 has a score of 84.1, which is slightly better than the Xiaomi Mi A2's global score of 78. Galaxy M21's body is newer, but somewhat heavier and thicker than the Xiaomi Mi A2. Xiaomi Mi A2's processor is just as good as Galaxy M21's processing unit, and although the Xiaomi Mi A2 has a higher amount of RAM, they both have a Octa-Core processing unit.
Samsung Galaxy M21 counts with a little sharper display than Xiaomi Mi A2, because it has a quite better resolution of 1080 x 2340px, a bit more pixels per inch in the screen and a little larger screen. The Samsung Galaxy M21 counts with more storage capacity for apps and games than Xiaomi Mi A2, because although it has only 64 GB internal memory capacity, it also counts with an external SD slot that supports a maximum of 512 GB.
The Samsung Galaxy M21 features a better camera than Xiaomi Mi A2, because although it has a tinier aperture which is not recommended for low light images and video, and they both have the same 30 frames per second video frame rates and the same 3840x2160 video definition, the Samsung Galaxy M21 also counts with a much bigger sensor providing a way higher image quality and a camera in the back with a much better 48 MP resolution.
Galaxy M21 counts with a really longer battery life than Xiaomi Mi A2, because it has a 6000mAh battery size.
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