| Global Score | |
| 74.9 | 80.1 |
| Basic Information | |
| Xiaomi | Xiaomi |
| Android 8.1 Oreo | Android 15 |
| 2018-07-19 | -- |
| 6.94 x 3.44 x 0.31 inches | -- |
| 7.80 ounces | -- |
| 16 777 216 | -- |
| Aluminum | -- |
| Display / Screen | |
| 6.9 inches | 6.7 inches |
| 2160 x 1080 pixels | -- |
| IPS LCD | AMOLED |
| 350 pixels per inch | -- |
| -- | 3000 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.7 | 5 |
| Performance | |
| Qualcomm Snapdragon 636 SDM636 chipset | Qualcomm Snapdragon 8 Elite SM8750-AB (4 nm) chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 1800 MHz) processor | processor |
| 4 GB RAM | 16 GB RAM |
| Adreno 509 GPU | Adreno 830 GPU |
| 8.91 | 6.3 |
| Storage | |
| 64 GB internal memory | 512 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | No SD card slot |
| 10.78 | 17.6 |
| Camera | |
| 12.00 MP + 8.00 MP | 200.00 MP + 32.00 MP |
| f/1.90 aperture | -- |
| 0.39 inches (1/2.55") 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 | 1920 x 1080 (1920 fps) (Full HD) slow motion video |
| 9.68 | 12.87 |
| Networks | |
| Wi-Fi | -- |
| Mobile Hotspot | -- |
| LTE-A (4G), LTE (4G), HSPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM | Nano SIM |
| 6.3 | 7.6 |
| Battery Life | |
| 5500mAh Li - Polymer Battery | 6000mAh Si - Carbon Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 7.2 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.4 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Xiaomi 15 Ultra (Rumored) is a little bit better than the Xiaomi Mi Max 3, with an 80.1 score against 74.9. These phones have Android OS, but the Xiaomi 15 Ultra (Rumored) has 15 version and Xiaomi Mi Max 3 has Android 8.1 Oreo. The Xiaomi 15 Ultra (Rumored) design is noticeably thinner and a lot lighter than the Xiaomi Mi Max 3.
The Xiaomi Mi Max 3 counts with a much sharper display than Xiaomi 15 Ultra (Rumored), because it has a bit bigger screen. Xiaomi 15 Ultra (Rumored) features a way bigger memory to store more games and applications than Xiaomi Mi Max 3, because although it has no external SD slot, it also counts with more internal storage capacity.
Xiaomi Mi Max 3 features a much better performance than Xiaomi 15 Ultra (Rumored), although it has a lower amount of RAM, they both have 8 cpu cores. The Xiaomi 15 Ultra (Rumored) features a bit longer battery duration than Xiaomi Mi Max 3, because it has a 6000mAh battery capacity. Xiaomi 15 Ultra (Rumored) has a much better camera than Xiaomi Mi Max 3, because it has a way better 7680x4320 video quality and a camera in the back with much more mega-pixels.
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