Compare phones
| Global Score | |
| 74.9 | 76 |
| Basic Information | |
| Xiaomi | OnePlus |
| Android 8.1 Oreo | Android 11 |
| 2018-07-19 | 2021-04-02 |
| 6.94 x 3.44 x 0.31 inches | 6.30 x 2.92 x 0.34 inches |
| 7.80 ounces | 6.77 ounces |
| 16 777 216 | Arctic Sky, Astral Black and Winter Mist |
| Aluminum | Aluminum and Glass (Corning Gorilla Glass) |
| -- | Scratch-Resistant Glass |
| -- | $ 700.00 |
| Display / Screen | |
| 6.9 inches | 6.5 inches |
| 2160 x 1080 pixels | 2400 x 1080 pixels |
| IPS LCD | AMOLED |
| 350 pixels per inch | 405 pixels per inch |
| No touch screen | No touch screen |
| 7.7 | 8.2 |
| Performance | |
| Qualcomm Snapdragon 636 SDM636 chipset | Qualcomm Snapdragon 888 chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 1800 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 4 GB RAM | 8 GB RAM |
| Adreno 509 GPU | Adreno 660 GPU |
| 8.91 | 9.63 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | No SD card slot |
| 10.78 | 10.1 |
| Camera | |
| 12.00 MP + 8.00 MP | 48.00 MP + 16.00 MP |
| f/1.90 aperture | f/1.80 aperture |
| -- | 23.00mm focal length |
| 0.39 inches (1/2.55") sensor | 0.71 inches (1/1.4") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 7680 x 4320 (30 fps) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1280 x 720 (480 fps) (HD) slow motion video |
| 9.68 | 12.65 |
| 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), HSDPA and HSUPA |
| Nano SIM | Nano SIM |
| 6.3 | 10.7 |
| Battery Life | |
| 5500mAh Li - Polymer Battery | 4500mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 7.2 | 6.32 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.2 |
| 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 |
| FM Radio | -- |
Comparison review
The OnePlus 9 is a bit better than the Xiaomi Mi Max 3, with a global score of 76 against 74.9. Both devices we compare here come with Android OS (Operating System), but the OnePlus 9 has the older 11 version while Xiaomi Mi Max 3 has Android 8.1 Oreo. The OnePlus 9 design is a lot newer and lighter, but also a little thicker than Xiaomi Mi Max 3.
The OnePlus 9 has a bit more vivid screen than Xiaomi Mi Max 3, because although it has a little bit smaller display, it also counts with a little better number of pixels in each inch of display and a little bit higher 1080 x 2400 resolution. The OnePlus 9 has just a bit better processing power than Xiaomi Mi Max 3, and although they both have a Octa-Core processing unit, the OnePlus 9 also has more RAM.
The Xiaomi Mi Max 3 counts with just a bit more memory capacity to install applications and games than OnePlus 9, because although it has 0 less internal storage capacity, it also counts with a slot for external memory cards that allows a maximum of 256 GB. The OnePlus 9 takes much clearer videos and photos than Xiaomi Mi Max 3, because it has a way higher video definition, a bigger aperture to capture better low-light photos and videos, a way higher 48 MP resolution back camera and a lot bigger sensor.
Xiaomi Mi Max 3 counts with better battery lifetime than OnePlus 9, because it has a 22% larger battery size.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.