Compare phones
| Global Score | |
| 83.2 | 76.1 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 10 |
| 2019-03-06 | 2020-06-29 |
| 6.20 x 2.94 x 0.30 inches | 6.61 x 3.02 x 0.32 inches |
| 6.10 ounces | 6.81 ounces |
| Black, Blue and Purple | Black |
| Glass (Corning Gorilla Glass 5) and Metal | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| -- | $ 194.00 |
| Display / Screen | |
| 6.4 inches | 6.5 inches |
| 2340 x 1080 pixels | 1600 x 720 pixels |
| AMOLED | IPS LCD |
| 403 pixels per inch | 270 pixels per inch |
| 600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.6 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 855 chipset | Mediatek Helio P35 chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 3 GB RAM |
| Adreno 640 GPU | PowerVR GE8320 GPU |
| 9.63 | 9.27 |
| 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 | 16.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.33 inches (1/3.06") 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 | 9.35 |
| 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 |
| 6.3 | 6.7 |
| Battery Life | |
| 3300mAh Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.28 | 5.92 |
| 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, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
The Xiaomi Mi 9 has a general score of 83.2, which is a bit better than Galaxy A21's 76.1 general score. Xiaomi Mi 9 is an older cellphone than the Galaxy A21, but Xiaomi was able to make it a bit thinner and lighter anyway. The Xiaomi Mi 9 has just a little better processing power than Samsung Galaxy A21, and although they both have the same number of cores, the Xiaomi Mi 9 also has 3 GB more RAM.
Xiaomi Mi 9 has a brighter screen than Samsung Galaxy A21, because although it has a quite smaller screen, it also counts with a way better 1080 x 2340 pixels resolution and a greater pixels density. Xiaomi Mi 9 has a lot better camera than Samsung Galaxy A21, and although they both have the same diafragm aperture, the Xiaomi Mi 9 also has a much bigger camera sensor shooting way better quality videos and photos, a back facing camera with a lot higher 48 megapixels resolution and a way better (4K) video quality.
The Xiaomi Mi 9 features slightly more storage capacity to install games and applications than Galaxy A21, because although it has no SD memory slot, it also counts with more internal storage. The Galaxy A21 counts with improved battery performance than Xiaomi Mi 9, because it has 4000mAh of battery capacity against 3300mAh.
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