Compare phones
| Global Score | |
| 83.2 | 85.3 |
| Basic Information | |
| Xiaomi | Microsoft |
| -- | Android 11 |
| 2019-03-06 | 2021-09-20 |
| 6.20 x 2.94 x 0.30 inches | 5.72 x 7.26 x 0.22 inches |
| 6.10 ounces | 10.02 ounces |
| Black, Blue and Purple | Glacier and Obsidian |
| Glass (Corning Gorilla Glass 5) and Metal | Glass (Corning Gorilla Glass) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 540.00 |
| Display / Screen | |
| 6.4 inches | 8.3 inches |
| 2340 x 1080 pixels | 2688 x 1892 pixels |
| AMOLED | AMOLED |
| 403 pixels per inch | 396 pixels per inch |
| 600 cd/m2 brightness | 800 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.6 | 8.8 |
| Performance | |
| Qualcomm Snapdragon 855 chipset | Qualcomm Snapdragon 888 SM8350 (5 nm) chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Kryo 680, 64-bit (Octa-Core 2840 MHz) processor |
| 6 GB RAM | 8 GB RAM |
| Adreno 640 GPU | Adreno 660 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 | |
| 48.00 MP + 20.00 MP | 12.00 MP + 12.00 MP |
| f/1.80 aperture | f/1.70 aperture |
| 26.00mm focal length | 27.00mm 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 (960 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 12.1 | 10.01 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.3 | 10.6 |
| Battery Life | |
| 3300mAh Battery | 4449mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.28 | 6.32 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| 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 the Xiaomi Mi 9, with a general score of 85.3 against 83.2. Even though the Microsoft Surface Duo 2 is notably heavier than the Xiaomi Mi 9, it's a lot thinner and incredibly newer. Microsoft Surface Duo 2 counts with a CPU that's just as good as the CPU in Xiaomi Mi 9, and although the Microsoft Surface Duo 2 has 2 GB more RAM, they both have 8 cores.
The Microsoft Surface Duo 2 has a bit more vivid display than Xiaomi Mi 9, because although it has a just a bit worse screen pixel density, it also counts with a larger screen, a brighter screen and a way better 1892 x 2688 resolution. The Xiaomi Mi 9 has a very superior camera than Microsoft Surface Duo 2, because although it has a tinier diafragm aperture, and they both have the same 3840x2160 (4K) video quality and the same video frame rate, the Xiaomi Mi 9 also counts with a back facing camera with a much better resolution.
Microsoft Surface Duo 2 has as much storage to store more games and applications as the Xiaomi Mi 9 one, both have the same 128 GB internal storage. The Microsoft Surface Duo 2 features improved battery life than Xiaomi Mi 9, because it has 4449mAh of battery capacity against 3300mAh.
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