Compare phones
| Global Score | |
| 84.1 | 83.3 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | Android 10, 9.0 Pie, 8.0 Oreo |
| 2020-03-23 | 2018-06-05 |
| 6.26 x 2.96 x 0.35 inches | 6.10 x 2.94 x 0.30 inches |
| 6.63 ounces | 6.17 ounces |
| Midnight blue and Raven black | Black, Blue, Gold and White |
| Plastic and Plastic | Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 6.2 inches |
| 2340 x 1080 pixels | 2248 x 1080 pixels |
| Super AMOLED | AMOLED |
| 403 pixels per inch | 402 pixels per inch |
| 420 cd/m2 brightness | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.4 | 8.6 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 845 SDM845 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| Mali-G72 MP3 GPU | Adreno 630 GPU |
| 9.27 | 9.63 |
| Storage | |
| 64 GB internal memory | 256 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 13.3 |
| 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 | 56.00mm focal length |
| 0.5 inches (1/2") sensor | 0.39 inches (1/2.55") 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 (960 fps) (HD) slow motion video |
| 11.55 | 9.9 |
| 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 | 3400mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.36 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
The Samsung Galaxy M21 has a general score of 84.1, which is a little bit better than Xiaomi Mi 8's 83.3 general score. The Samsung Galaxy M21 body is newer than Xiaomi Mi 8's, but it is a little bit heavier and somewhat thicker. Both of these phones have Android OS (Operating System), but the Samsung Galaxy M21 has 11 version while Xiaomi Mi 8 has Android 10 version, so it gives a lot of extra features.
The Xiaomi Mi 8 features a bit better processing power than Galaxy M21, and although they both have 8 CPU cores, the Xiaomi Mi 8 also has a greater amount of RAM. Xiaomi Mi 8 features a bit better display than Samsung Galaxy M21, because although it has a just a little worse quantity of pixels per inch of display, a bit smaller display and a little worse resolution of 1080 x 2248, it also counts with more display brightness.
The Xiaomi Mi 8 has a better memory capacity for apps and games than Galaxy M21, because although it has no external memory slot, it also counts with 256 GB internal storage capacity. Samsung Galaxy M21 counts with a way better battery performance than Xiaomi Mi 8, because it has a 6000mAh battery size against 3400mAh.
The Samsung Galaxy M21 features a much better camera than Xiaomi Mi 8, because although it has a tinier aperture which is not favorable for capturing photos or video in poorly lited situations, and they both have the same 30 frames per second video frame rates and the same video quality, the Samsung Galaxy M21 also counts with a much bigger camera sensor and a camera with a lot better 48 MP resolution.
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