Compare phones
| Global Score | |
| 83.2 | 77.7 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 10 |
| 2019-03-06 | 2020-06-19 |
| 6.20 x 2.94 x 0.30 inches | 6.44 x 2.96 x 0.35 inches |
| 6.10 ounces | 6.77 ounces |
| Black, Blue and Purple | Black, Blue, Red and White |
| Glass (Corning Gorilla Glass 5) and Metal | -- |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.4 inches | 6.5 inches |
| 2340 x 1080 pixels | 1600 x 720 pixels |
| AMOLED | TFT |
| 403 pixels per inch | 270 pixels per inch |
| 600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.6 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 855 chipset | Samsung Exynos 850 chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A55, 64-bit (Octa-Core 2000 MHz) processor |
| 6 GB RAM | 3 GB RAM |
| Adreno 640 GPU | Mali-G76 GPU |
| 9.63 | 9.09 |
| Storage | |
| 128 GB internal memory | 32 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 9.84 |
| Camera | |
| 48.00 MP + 20.00 MP | 48.00 MP + 13.00 MP |
| f/1.80 aperture | f/2.00 aperture |
| 26.00mm focal length | 26.00mm focal length |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (960 fps) (Full HD) slow motion video | -- |
| 12.1 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.3 | 6.7 |
| Battery Life | |
| 3300mAh Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.28 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
Comparison review
Xiaomi Mi 9 has a general score of 83.2, which is just a bit better than Galaxy A21s's 77.7 general score. Xiaomi Mi 9's construction is thinner and a little bit lighter than Galaxy A21s, despite of the fact that it was released a little bit further than a year before. The Xiaomi Mi 9 counts with a better display than Samsung Galaxy A21s, because although it has a little smaller screen, it also counts with a lot higher 1080 x 2340 resolution and a better pixel number in each inch of screen.
The Xiaomi Mi 9 counts with a bit better processor than Galaxy A21s, and although they both have a Octa-Core processor, the Xiaomi Mi 9 also has 3 GB more RAM memory. Xiaomi Mi 9 features a bit bigger memory for games and applications than Galaxy A21s, because although it has no SD memory card expansion slot, it also counts with more internal storage capacity.
Galaxy A21s has a superior battery lifetime than Xiaomi Mi 9, because it has a 52 percent greater battery capacity. Xiaomi Mi 9 counts with a much better camera than Samsung Galaxy A21s, and although they both have a same size camera sensor and a 48 mega pixels resolution back facing camera, the Xiaomi Mi 9 also has a much higher (4K) video resolution and a bigger camera aperture to capture better photography and videos in low light situations.
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