Compare phones
| Global Score | |
| 83.2 | 85.5 |
| Basic Information | |
| Xiaomi | Samsung |
| -- | Android 11, 10 |
| 2019-03-06 | 2019-12-27 |
| 6.20 x 2.94 x 0.30 inches | 6.24 x 2.90 x 0.31 inches |
| 6.10 ounces | 6.07 ounces |
| Black, Blue and Purple | Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white |
| Glass (Corning Gorilla Glass 5) and Metal | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 282.00 |
| Display / Screen | |
| 6.4 inches | 6.5 inches |
| 2340 x 1080 pixels | 2400 x 1080 pixels |
| AMOLED | Super AMOLED |
| 403 pixels per inch | 405 pixels per inch |
| 600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.6 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 855 chipset | Samsung Exynos 9611 chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 640 GPU | Mali-G72 MP3 GPU |
| 9.63 | 9.27 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 10.1 | 14.14 |
| Camera | |
| 48.00 MP + 20.00 MP | 48.00 MP + 32.00 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 | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (960 fps) (Full HD) slow motion video | 1280 x 720 (240 fps) (HD) slow motion video |
| 12.1 | 11.55 |
| 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 | 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
Galaxy A51 is a bit better than the Xiaomi Mi 9, with an 85.5 score against 83.2. Galaxy A51 is a newer and a little bit lighter cellphone than the Xiaomi Mi 9, although it is just a little bit thicker. Xiaomi Mi 9 counts with a bit more vivid display than Galaxy A51, although it has a little smaller screen, a little bit worse pixel quantity per screen inch and a little worse resolution of 1080 x 2340px.
The Galaxy A51 has a way bigger storage for games and applications than Xiaomi Mi 9, and although they both have the same 128 GB internal memory, the Galaxy A51 also has a slot for an SD memory card that supports up to 512 GB. Xiaomi Mi 9 features a little faster processor than Galaxy A51, and although they both have 8 CPU cores, the Xiaomi Mi 9 also has a higher amount of RAM.
The Galaxy A51 has improved battery lifetime than Xiaomi Mi 9, because it has 4000mAh of battery capacity against 3300mAh. Xiaomi Mi 9 counts with a bit better camera than Galaxy A51, and although they both have a 0.5 inches back camera sensor, the same 3840x2160 (4K) video quality and the same resolution back-facing camera, the Xiaomi Mi 9 also has a bigger diafragm aperture and better 60 frames per second video frame rates.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.