| Global Score | |
| 80.1 | 76.7 |
| Basic Information | |
| Xiaomi | Xiaomi |
| Android 15 | Android 12 |
| -- | 2022-03-23 |
| -- | 6.46 x 3.00 x 0.32 inches |
| -- | 7.23 ounces |
| -- | Laser Black, Laser Blue and POCO Yellow |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.7 inches | 6.7 inches |
| -- | 2400 x 1080 pixels |
| AMOLED | AMOLED |
| -- | 393 pixels per inch |
| 3000 cd/m2 brightness | 1200 cd/m2 brightness |
| No touch screen | No touch screen |
| 5 | 8.9 |
| Performance | |
| Qualcomm Snapdragon 8 Elite SM8750-AB (4 nm) chipset | Qualcomm Snapdragon 696 SM6375 (6 nm) chipset |
| processor | processor |
| 16 GB RAM | 6 GB RAM |
| Adreno 830 GPU | Adreno 619 GPU |
| 6.3 | 6.12 |
| Storage | |
| 512 GB internal memory | 128 GB internal memory |
| No SD card slot | microSDXC (up to 1 TB) external memory slot |
| 17.6 | 15.42 |
| Camera | |
| 200.00 MP + 32.00 MP | 108.00 MP + 16.00 MP |
| -- | f/1.90 aperture |
| 7680 x 4320 (30 fps) video resolution | -- |
| 1920 x 1080 (1920 fps) (Full HD) slow motion video | -- |
| 12.87 | 10.34 |
| Networks | |
| -- | Wi-Fi |
| -- | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA |
| Nano SIM | Nano SIM |
| 7.6 | 10.6 |
| Battery Life | |
| 6000mAh Si - Carbon Battery | 5000mAh Nano SIM Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 7.52 | 6.8 |
| Other Features | |
| Bluetooth 5.4 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| Infra-red port | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope, Light Sensor and Proximity Sensor |
Xiaomi 15 Ultra (Rumored) is slightly better than Xiaomi POCO X4 Pro 5G, getting an 80.1 score against 76.7. Xiaomi 15 Ultra (Rumored)'s construction is noticeably thinner and notably lighter than the Xiaomi POCO X4 Pro 5G. These devices work with Android OS (Operating System), but the Xiaomi 15 Ultra (Rumored) has 15 version and Xiaomi POCO X4 Pro 5G has Android 12 version, so it provides the user a lot of extra features.
Xiaomi 15 Ultra (Rumored) features a bit better performance than Xiaomi POCO X4 Pro 5G, and although they both have a Octa-Core processor, the Xiaomi 15 Ultra (Rumored) also has 10 GB more RAM. Xiaomi POCO X4 Pro 5G counts with a much more vibrant display than Xiaomi 15 Ultra (Rumored), although it has much less brightness, they both have a screen with the same size.
Xiaomi 15 Ultra (Rumored) counts with a bigger memory to install applications and games than Xiaomi POCO X4 Pro 5G, because although it has no SD memory slot, it also counts with 512 GB internal storage. The Xiaomi 15 Ultra (Rumored) has greater battery life than Xiaomi POCO X4 Pro 5G, because it has a 20 percent bigger battery size.
Xiaomi 15 Ultra (Rumored) takes much clearer photographs and videos than Xiaomi POCO X4 Pro 5G, because it has a back camera with much more megapixels.
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