Compare phones
| Global Score | |
| 83.2 | 81.3 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 10 |
| 2019-03-06 | 2020-04-27 |
| 6.20 x 2.94 x 0.30 inches | 6.27 x 2.88 x 0.34 inches |
| 6.10 ounces | 6.53 ounces |
| Black, Blue and Purple | Prism Crush black, Prism Crush blue, Prism Crush red and Prism Crush white |
| Glass (Corning Gorilla Glass 5) and Metal | Plastic |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.4 inches | 6.4 inches |
| 2340 x 1080 pixels | 2400 x 1080 pixels |
| AMOLED | Super AMOLED |
| 403 pixels per inch | 411 pixels per inch |
| 600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.6 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 855 chipset | MediaTek Helio P65 MT6768 chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 640 GPU | Mali-G52 MC2 GPU |
| 9.63 | 9.09 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 11.74 |
| Camera | |
| 48.00 MP + 20.00 MP | 48.00 MP + 20.00 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 | 10.89 |
| 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, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
The Xiaomi Mi 9 is slightly better than Galaxy A31, with an 83.2 score against 81.3. Despite of the fact that Xiaomi Mi 9 is older than the Galaxy A31, it's design is a little lighter and somewhat thinner. The Xiaomi Mi 9 counts with a little sharper screen than Galaxy A31, although it has a little lower resolution of 1080 x 2340 pixels and a just a little lower display density, they both have a screen with the same size.
The Xiaomi Mi 9 counts with a bit faster CPU than Galaxy A31, and although they both have 8 processing cores, the Xiaomi Mi 9 also has 2 GB more RAM memory. Xiaomi Mi 9 has a better camera than Galaxy A31, and although they both have a 48 megapixels resolution back camera and a same size camera sensor, the Xiaomi Mi 9 also has a much better video resolution and a larger diafragm aperture.
Galaxy A31 has a quite bigger memory capacity to install games and applications than Xiaomi Mi 9, because although it has only 64 GB internal storage capacity, it also counts with a SD extension slot that supports a maximum of 512 GB. Samsung Galaxy A31 has a much better battery duration than Xiaomi Mi 9, because it has 5000mAh of battery capacity against 3300mAh.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.