Compare phones
| Global Score | |
| 83.2 | 78.8 |
| Basic Information | |
| Xiaomi | Microsoft |
| -- | Android 10 |
| 2019-03-06 | 2020-09-10 |
| 6.20 x 2.94 x 0.30 inches | 7.36 x 5.72 x 0.19 inches |
| 6.10 ounces | 8.82 ounces |
| Black, Blue and Purple | Glacier |
| Glass (Corning Gorilla Glass 5) and Metal | Glass (Corning Gorilla Glass 5) |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 540.00 |
| Display / Screen | |
| 6.4 inches | 8.1 inches |
| 2340 x 1080 pixels | 2700 x 1800 pixels |
| AMOLED | AMOLED |
| 403 pixels per inch | 401 pixels per inch |
| 600 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.6 | 8.2 |
| Performance | |
| Qualcomm Snapdragon 855 chipset | Qualcomm Snapdragon 855 SM8150 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 | |
| 48.00 MP + 20.00 MP | 11.00 MP |
| f/1.80 aperture | f/2.00 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 | -- |
| 12.1 | 8.91 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.3 | 6.7 |
| Battery Life | |
| 3300mAh Battery | 3577mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 5.28 | 5.52 |
| 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
Xiaomi Mi 9 has a general score of 83.2, which is a bit better than the Microsoft Surface Duo's score of 78.8. The Xiaomi Mi 9 design is a lot lighter than Microsoft Surface Duo, although it's a lot thicker and was released around 18 months before. The Xiaomi Mi 9 counts with a slightly better looking display than Microsoft Surface Duo, because although it has a lot worse resolution of 1080 x 2340 and a really smaller display, it also counts with a little bit greater quantity of pixels per inch of screen.
Microsoft Surface Duo and Xiaomi Mi 9 both feature extremely similar memory to install applications and games or saving photos and videos, they have equal internal storage capacity. Microsoft Surface Duo counts with a CPU that's very similar to the Xiaomi Mi 9 one, both have 8 cpu cores and a 6 GB RAM.
Microsoft Surface Duo has a little better battery performance than Xiaomi Mi 9, because it has 3577mAh of battery capacity. The Xiaomi Mi 9 shoots much better pictures and videos than Microsoft Surface Duo, and although they both have the same 3840x2160 (4K) video definition and the same video frame rates, the Xiaomi Mi 9 also has a way more megapixels back facing camera and a larger camera aperture to capture better low light photos and videos.
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