Compare phones
| Global Score | |
| 75.3 | 76.7 |
| Basic Information | |
| Xiaomi | Xiaomi |
| Android 8.1 Oreo, 7.1 Nougat | Android 11 |
| 2017-09-12 | 2021-05-27 |
| 6.01 x 2.91 x 0.30 inches | 6.23 x 2.96 x 0.33 inches |
| 5.75 ounces | 6.70 ounces |
| Black and Blue | Moonlight White, Neptune Blue and Space Black, |
| Aluminum and Glass | Glass and Plastic |
| -- | Scratch-Resistant Glass |
| $ 444.00 | -- |
| Display / Screen | |
| 5.5 inches | 6.3 inches |
| 1920 x 1080 pixels (Full HD) | 2340 x 1080 pixels |
| IPS LCD | IPS LCD |
| 401 pixels per inch | 409 pixels per inch |
| 550 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.5 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 660 chipset | MediaTek Helio G85 MT6769Z chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 512 GPU | Mali G52 MC2 GPU |
| 9.27 | 9.09 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 128 GB) external memory slot |
| 10.1 | 10.02 |
| Camera | |
| 12.00 MP + 16.00 MP | 48.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 27.00mm focal length | -- |
| -- | 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 (120 fps) (HD) slow motion video | 1280 x 720 (120 fps) (HD) slow motion video |
| 9.57 | 11 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| -- | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSPA |
| Nano SIM, Dual SIM | Nano SIM |
| 3 | 6.6 |
| Battery Life | |
| 3500mAh Li - Ion Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.44 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.2 |
| GPS | GPS |
| NFC | -- |
| Infra-red port | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
The Xiaomi Redmi Note 8 2021 has a general score of 76.7, which is a little bit better than Xiaomi Mi Note 3's 75.3 global score. Xiaomi Redmi Note 8 2021's body is noticeably newer than Xiaomi Mi Note 3's, but it is a little bit thicker and heavier. These devices come with Android OS, but the Xiaomi Redmi Note 8 2021 has the previous 11 version while Xiaomi Mi Note 3 has Android 8.1 Oreo.
The Xiaomi Mi Note 3 features a bit better hardware performance than Xiaomi Redmi Note 8 2021, and although they both have the same number of cores, the Xiaomi Mi Note 3 also has a higher amount of RAM. The Xiaomi Mi Note 3 counts with a slightly better screen than Xiaomi Redmi Note 8 2021, although it has a quite smaller display, a quite worse pixel density and a quite lower 1080 x 1920 pixels resolution.
Xiaomi Redmi Note 8 2021 takes much better pictures and videos than Xiaomi Mi Note 3, and although they both have the same 30 frames per second video frame rate, a same size aperture and the same video definition, the Xiaomi Redmi Note 8 2021 also has a way more mega-pixels camera. The Xiaomi Mi Note 3 has a slightly bigger storage to store more games and applications than Xiaomi Redmi Note 8 2021, because although it has no SD memory slot, it also counts with 128 GB internal memory capacity.
Xiaomi Redmi Note 8 2021 has a little longer battery lifetime than Xiaomi Mi Note 3, because it has a 14 percent greater battery capacity.
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