Compare phones
| Global Score | |
| 85.5 | 76.7 |
| Basic Information | |
| Samsung | Xiaomi |
| Android 11, 10 | Android 11 |
| 2019-12-27 | 2021-05-27 |
| 6.24 x 2.90 x 0.31 inches | 6.23 x 2.96 x 0.33 inches |
| 6.07 ounces | 6.70 ounces |
| Prism Crush black, Prism Crush blue, Prism Crush pink and Prism Crush white | Moonlight White, Neptune Blue and Space Black, |
| Plastic and Plastic | Glass and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 282.00 | -- |
| Display / Screen | |
| 6.5 inches | 6.3 inches |
| 2400 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | IPS LCD |
| 405 pixels per inch | 409 pixels per inch |
| No touch screen | No touch screen |
| 8.1 | 8.1 |
| Performance | |
| Samsung Exynos 9611 chipset | MediaTek Helio G85 MT6769Z chipset |
| ARM Cortex-A73 and ARM Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 4 GB RAM | 4 GB RAM |
| Mali-G72 MP3 GPU | Mali G52 MC2 GPU |
| 9.27 | 9.09 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 128 GB) external memory slot |
| 14.14 | 10.02 |
| Camera | |
| 48.00 MP + 32.00 MP | 48.00 MP + 13.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | 1280 x 720 (120 fps) (HD) slow motion video |
| 11.55 | 11 |
| 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+ (4G), HSDPA and HSPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 6.6 |
| Battery Life | |
| 4000mAh Li - Polymer Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.2 |
| GPS | GPS |
| 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 much better than Xiaomi Redmi Note 8 2021, with a score of 85.5 against 76.7. The Galaxy A51 is an older cellphone than Xiaomi Redmi Note 8 2021, but Samsung managed to make it just a little thinner and a little lighter. Both of these phones include the same Android 11 OS, so you shouldn't perceive any difference in that aspect.
Galaxy A51 counts with a little better performance than Xiaomi Redmi Note 8 2021. Both have 8 cpu cores and the same RAM amount. Xiaomi Redmi Note 8 2021 has a screen that's very similar to Galaxy A51's screen, because although the Xiaomi Redmi Note 8 2021 has a bit worse 1080 x 2340 resolution and a little smaller display, it also counts with a bit more pixels per inch of screen.
The Galaxy A51 features a lot bigger storage to store more apps and games than Xiaomi Redmi Note 8 2021, because it has more internal storage and a slot for external memory cards that allows up to 512 GB. The Galaxy A51 captures slightly better photos and videos than Xiaomi Redmi Note 8 2021, because although it has a smaller aperture which is not favorable for low light photos and videos, and they both have a same size sensor and a back facing camera with a 48 megapixels, the Galaxy A51 also counts with a lot higher 3840x2160 video quality.
The Xiaomi Redmi Note 8 2021 and Samsung Galaxy A51 count with extremely similar batteries duration.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.