Compare phones
| Global Score | |
| 81.3 | 83.2 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 10 | -- |
| 2020-04-27 | 2019-03-06 |
| 6.27 x 2.88 x 0.34 inches | 6.20 x 2.94 x 0.30 inches |
| 6.53 ounces | 6.10 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white | Black, Blue and Purple |
| Plastic | Glass (Corning Gorilla Glass 5) and Metal |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.4 inches | 6.4 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | AMOLED |
| 411 pixels per inch | 403 pixels per inch |
| -- | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.1 | 8.6 |
| Performance | |
| MediaTek Helio P65 MT6768 chipset | Qualcomm Snapdragon 855 chipset |
| Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor | Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| Mali-G52 MC2 GPU | Adreno 640 GPU |
| 9.09 | 9.63 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | No SD card slot |
| 11.74 | 10.1 |
| Camera | |
| 48.00 MP + 20.00 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 |
| 10.89 | 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, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
The Xiaomi Mi 9 is a bit better than the Galaxy A31, getting an 83.2 score against 81.3. The Xiaomi Mi 9 construction is somewhat thinner and a little bit lighter than the Galaxy A31, although it was released only 14 months before. The Xiaomi Mi 9 features a little bit better looking screen than Samsung Galaxy A31, although it has a just a bit worse pixels density and a bit worse resolution of 1080 x 2340 pixels, they both have a screen with the same size.
Galaxy A31 features a quite bigger memory capacity for applications and games than Xiaomi Mi 9, because although it has just 64 GB internal memory capacity, it also counts with a SD card slot that supports a maximum of 512 GB. Xiaomi Mi 9 features a bit better processing power than Galaxy A31, and although they both have the same number of cores, the Xiaomi Mi 9 also has more RAM memory.
The Xiaomi Mi 9 takes better videos and photos than Samsung Galaxy A31, and although they both have a same size back-facing camera sensor and the same resolution back-facing camera, the Xiaomi Mi 9 also has a larger diafragm aperture and a lot higher (4K) video definition. The Samsung Galaxy A31 features a really longer battery life than Xiaomi Mi 9, because it has 5000mAh of battery capacity against 3300mAh.
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