Compare phones
| Global Score | |
| 83.3 | 77.7 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 10, 9.0 Pie, 8.0 Oreo | Android 10 |
| 2018-06-05 | 2020-06-19 |
| 6.10 x 2.94 x 0.30 inches | 6.44 x 2.96 x 0.35 inches |
| 6.17 ounces | 6.77 ounces |
| Black, Blue, Gold and White | Black, Blue, Red and White |
| Glass (Corning Gorilla Glass 5) | -- |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.2 inches | 6.5 inches |
| 2248 x 1080 pixels | 1600 x 720 pixels |
| AMOLED | TFT |
| 402 pixels per inch | 270 pixels per inch |
| 600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.6 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 845 SDM845 chipset | Samsung Exynos 850 chipset |
| Kryo 385, 64-bit, 10 nm (Octa-Core 2800 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 6 GB RAM | 3 GB RAM |
| Adreno 630 GPU | Mali-G76 GPU |
| 9.63 | 9.09 |
| Storage | |
| 256 GB internal memory | 32 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 13.3 | 9.84 |
| Camera | |
| 12.00 MP + 20.00 MP | 48.00 MP + 13.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 56.00mm focal length | 26.00mm focal length |
| 0.39 inches (1/2.55") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 9.9 | 10.78 |
| 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 | |
| 3400mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.36 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
Comparison review
The Xiaomi Mi 8 has an overall score of 83.3, which is a bit better than the Galaxy A21s's general score of 77.7. Although Xiaomi Mi 8 is extremely older than Galaxy A21s, it's construction is thinner and just a bit lighter. These devices have the same Android 10 operating system, so both of them should provide the user identical OS features.
Xiaomi Mi 8 counts with just a bit better processing power than Samsung Galaxy A21s, and although they both have a Octa-Core processor, the Xiaomi Mi 8 also has 3 GB more RAM. The Xiaomi Mi 8 counts with a much better looking display than Galaxy A21s, because although it has a quite smaller screen, it also counts with a lot higher 1080 x 2248 pixels resolution and a greater number of pixels per display inch.
The Xiaomi Mi 8 features a lot bigger memory for games and applications than Samsung Galaxy A21s, because although it has no slot for an SD memory card, it also counts with 224 GB more internal memory capacity. The Samsung Galaxy A21s counts with a bit better camera than Xiaomi Mi 8, because although it has a tinier diafragm aperture which is not favorable for shooting photographs in low-light environments, and they both have the same 30 frames per second video frame rate and the same 1920x1080 (Full HD) video definition, the Samsung Galaxy A21s also counts with a much bigger back-facing camera sensor and a lot more megapixels camera in the back.
Samsung Galaxy A21s has a way better battery performance than Xiaomi Mi 8, because it has a 47% greater battery size.
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