Compare phones
| Global Score | |
| 78.8 | 83.2 |
| Basic Information | |
| Microsoft | Xiaomi |
| Android 10 | -- |
| 2020-09-10 | 2019-03-06 |
| 7.36 x 5.72 x 0.19 inches | 6.20 x 2.94 x 0.30 inches |
| 8.82 ounces | 6.10 ounces |
| Glacier | Black, Blue and Purple |
| Glass (Corning Gorilla Glass 5) | Glass (Corning Gorilla Glass 5) and Metal |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 540.00 | -- |
| Display / Screen | |
| 8.1 inches | 6.4 inches |
| 2700 x 1800 pixels | 2340 x 1080 pixels |
| AMOLED | AMOLED |
| 401 pixels per inch | 403 pixels per inch |
| -- | 600 cd/m2 brightness |
| No touch screen | No touch screen |
| 8.2 | 8.6 |
| Performance | |
| Qualcomm Snapdragon 855 SM8150 chipset | Qualcomm Snapdragon 855 chipset |
| Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor | Kryo 485, 64-bit, 7 nm (Octa-Core 2840 MHz) processor |
| 6 GB RAM | 6 GB RAM |
| Adreno 640 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 | |
| 11.00 MP | 48.00 MP + 20.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| -- | 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 (960 fps) (Full HD) slow motion video |
| 8.91 | 12.1 |
| 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 and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.3 |
| Battery Life | |
| 3577mAh Battery | 3300mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.52 | 5.28 |
| Other Features | |
| Bluetooth 5.0 | 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 Xiaomi Mi 9 has a general score of 83.2, which is a little bit better than the Microsoft Surface Duo's 78.8 global score. Although Xiaomi Mi 9 is older and a lot thicker than Microsoft Surface Duo, it's construction is still extremely lighter. The Xiaomi Mi 9 has a little sharper display than Microsoft Surface Duo, because although it has a lot worse 1080 x 2340 resolution and a way smaller screen, it also counts with a bit greater pixels number in each screen inch.
Xiaomi Mi 9 and Microsoft Surface Duo have extremely similar memory for games and applications, both have equal internal memory. The Microsoft Surface Duo and the Xiaomi Mi 9 have incredibly similar processors, they have 8 CPU cores and a 6 GB RAM. The Microsoft Surface Duo features a bit better battery duration than Xiaomi Mi 9, because it has a 3577mAh battery capacity.
Xiaomi Mi 9 shoots much better videos and photos than Microsoft Surface Duo, and although they both have the same 60 fps video frame rates and the same (4K) video definition, the Xiaomi Mi 9 also has a bigger camera aperture for better low-light photos and video and a back-facing camera with way more mega-pixels.
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