Compare phones
| Global Score | |
| 78.8 | 76.7 |
| Basic Information | |
| Microsoft | Xiaomi |
| Android 10 | Android 11 |
| 2020-09-10 | 2021-05-27 |
| 7.36 x 5.72 x 0.19 inches | 6.23 x 2.96 x 0.33 inches |
| 8.82 ounces | 6.70 ounces |
| Glacier | Moonlight White, Neptune Blue and Space Black, |
| Glass (Corning Gorilla Glass 5) | Glass and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 540.00 | -- |
| Display / Screen | |
| 8.1 inches | 6.3 inches |
| 2700 x 1800 pixels | 2340 x 1080 pixels |
| AMOLED | IPS LCD |
| 401 pixels per inch | 409 pixels per inch |
| No touch screen | No touch screen |
| 8.2 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 855 SM8150 chipset | MediaTek Helio G85 MT6769Z chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Cortex-A75, 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 128 GB) external memory slot |
| 10.1 | 10.02 |
| Camera | |
| 11.00 MP | 48.00 MP + 13.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| -- | 0.5 inches (1/2") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| -- | 1280 x 720 (120 fps) (HD) slow motion video |
| 8.91 | 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 | |
| 3577mAh Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.52 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.2 |
| GPS | GPS |
| -- | 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 Microsoft Surface Duo is a bit better than the Xiaomi Redmi Note 8 2021, getting a 78.8 score against 76.7. Even though Microsoft Surface Duo and the Xiaomi Redmi Note 8 2021 were released with only a couple of months difference, the Microsoft Surface Duo body is notably heavier but extremely thinner. These phones include Android OS, but the Microsoft Surface Duo has 10 version while Xiaomi Redmi Note 8 2021 has Android 11.
The Microsoft Surface Duo counts with a little more vivid display than Xiaomi Redmi Note 8 2021, because although it has a just a bit lower display density, it also counts with a bigger display and a higher 1800 x 2700 resolution. The Microsoft Surface Duo counts with just a bit bigger storage to store more games and applications than Xiaomi Redmi Note 8 2021, because although it has no external SD slot, it also counts with more internal memory capacity.
The Microsoft Surface Duo counts with a bit superior processing unit than Xiaomi Redmi Note 8 2021, and although they both have the same number of cores, the Microsoft Surface Duo also has a greater amount of RAM memory. Xiaomi Redmi Note 8 2021 has a bit superior battery lifetime than Microsoft Surface Duo, because it has 4000mAh of battery capacity instead of 3577mAh.
Xiaomi Redmi Note 8 2021 takes a lot better photos and videos than Microsoft Surface Duo, because although it has lower video frame rate, and they both have the same 1920x1080 (Full HD) video resolution, the Xiaomi Redmi Note 8 2021 also counts with a way better resolution back facing camera and a bigger aperture.
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