Compare phones
| Global Score | |
| 77.7 | 83.2 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 10 | -- |
| 2020-06-19 | 2019-03-06 |
| 6.44 x 2.96 x 0.35 inches | 6.20 x 2.94 x 0.30 inches |
| 6.77 ounces | 6.10 ounces |
| Black, Blue, Red and White | Black, Blue and Purple |
| -- | Glass (Corning Gorilla Glass 5) and Metal |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.5 inches | 6.4 inches |
| 1600 x 720 pixels | 2340 x 1080 pixels |
| TFT | AMOLED |
| 270 pixels per inch | 403 pixels per inch |
| -- | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.2 | 8.6 |
| Performance | |
| Samsung Exynos 850 chipset | Qualcomm Snapdragon 855 chipset |
| Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor | Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 6 GB RAM |
| Mali-G76 GPU | Adreno 640 GPU |
| 9.09 | 9.63 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 9.84 | 10.1 |
| Camera | |
| 48.00 MP + 13.00 MP | 48.00 MP + 20.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| -- | 1920 x 1080 (960 fps) (Full HD) slow motion video |
| 10.78 | 12.1 |
| 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 | |
| 5000mAh Li - Polymer Battery | 3300mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.8 | 5.28 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
The Xiaomi Mi 9 has an overall score of 83.2, which is slightly better than the Galaxy A21s's 77.7 general score. Although Xiaomi Mi 9 is older than the Galaxy A21s, it's construction is somewhat thinner and just a little lighter. The Xiaomi Mi 9 features just a bit better hardware performance than Samsung Galaxy A21s, and although they both have a Octa-Core CPU, the Xiaomi Mi 9 also has a larger amount of RAM.
The Xiaomi Mi 9 features a better display than Galaxy A21s, because although it has a bit smaller screen, it also counts with a much better resolution of 1080 x 2340px and a better display pixels density. The Xiaomi Mi 9 has a better camera than Galaxy A21s, and although they both have a back-facing camera with a 48 MP and the same back camera sensor size, the Xiaomi Mi 9 also has a way higher (4K) video definition and a larger aperture.
The Xiaomi Mi 9 counts with a slightly bigger memory for apps and games than Galaxy A21s, because although it has no slot for an SD memory card, it also counts with 128 GB internal memory. The Galaxy A21s features a way better battery duration than Xiaomi Mi 9, because it has 5000mAh of battery capacity instead of 3300mAh.
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