Compare phones
| Global Score | |
| 85.3 | 83.2 |
| Basic Information | |
| Microsoft | Xiaomi |
| Android 11 | -- |
| 2021-09-20 | 2019-03-06 |
| 5.72 x 7.26 x 0.22 inches | 6.20 x 2.94 x 0.30 inches |
| 10.02 ounces | 6.10 ounces |
| Glacier and Obsidian | Black, Blue and Purple |
| Glass (Corning Gorilla Glass) | Glass (Corning Gorilla Glass 5) and Metal |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 540.00 | -- |
| Display / Screen | |
| 8.3 inches | 6.4 inches |
| 2688 x 1892 pixels | 2340 x 1080 pixels |
| AMOLED | AMOLED |
| 396 pixels per inch | 403 pixels per inch |
| 800 cd/m2 brightness | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.8 | 8.6 |
| Performance | |
| Qualcomm Snapdragon 888 SM8350 (5 nm) chipset | Qualcomm Snapdragon 855 chipset |
| Kryo 680, 64-bit (Octa-Core 2840 MHz) processor | Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor |
| 8 GB RAM | 6 GB RAM |
| Adreno 660 GPU | Adreno 640 GPU |
| 9.63 | 9.63 |
| Storage | |
| 128 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 10.1 | 10.1 |
| Camera | |
| 12.00 MP + 12.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/1.80 aperture |
| 27.00mm focal length | 26.00mm focal length |
| -- | 0.5 inches (1/2") sensor |
| 3840 x 2160 (60 fps) (4K) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | 1920 x 1080 (960 fps) (Full HD) slow motion video |
| 10.01 | 12.1 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | LTE-A (4G), LTE (4G), HSPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 10.6 | 6.3 |
| Battery Life | |
| 4449mAh Battery | 3300mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6.32 | 5.28 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.0 |
| 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 |
Comparison review
The Microsoft Surface Duo 2 is a little bit better than Xiaomi Mi 9, with an 85.3 score against 83.2. The Microsoft Surface Duo 2 body is much newer and incredibly thinner, but heavier than Xiaomi Mi 9. Xiaomi Mi 9's CPU is just as good as the Microsoft Surface Duo 2 one, and although the Xiaomi Mi 9 has lesser RAM, they both have the same number of cores.
The Microsoft Surface Duo 2 counts with a little bit better display than Xiaomi Mi 9, because although it has a little bit less pixels per inch in the screen, it also counts with a brighter screen, a larger display and a lot better 1892 x 2688 pixels resolution. Xiaomi Mi 9 has as much storage capacity to store more games and applications as Microsoft Surface Duo 2, they have the same internal memory capacity.
Microsoft Surface Duo 2 has superior battery lifetime than Xiaomi Mi 9, because it has 4449mAh of battery capacity against 3300mAh. Xiaomi Mi 9 captures a lot better videos and photos than Microsoft Surface Duo 2, because although it has a tinier aperture which is not recommended for capturing photographs or video in poorly lited environments, and they both have the same (4K) video definition and the same 60 fps video frame rates, the Xiaomi Mi 9 also counts with a much more mega-pixels back-facing camera.
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