Compare phones
| Global Score | |
| 80.1 | 76.7 |
| Basic Information | |
| Xiaomi | Xiaomi |
| Android 15 | Android 11 |
| -- | 2021-05-27 |
| -- | 6.23 x 2.96 x 0.33 inches |
| -- | 6.70 ounces |
| -- | Moonlight White, Neptune Blue and Space Black, |
| -- | Glass and Plastic |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.7 inches | 6.3 inches |
| -- | 2340 x 1080 pixels |
| AMOLED | IPS LCD |
| -- | 409 pixels per inch |
| 3000 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 5 | 8.1 |
| Performance | |
| Qualcomm Snapdragon 8 Elite SM8750-AB (4 nm) chipset | MediaTek Helio G85 MT6769Z chipset |
| processor | Cortex-A75, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 16 GB RAM | 4 GB RAM |
| Adreno 830 GPU | Mali G52 MC2 GPU |
| 6.3 | 9.09 |
| Storage | |
| 512 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 128 GB) external memory slot |
| 17.6 | 10.02 |
| Camera | |
| 200.00 MP + 32.00 MP | 48.00 MP + 13.00 MP |
| -- | f/1.80 aperture |
| -- | 0.5 inches (1/2") sensor |
| 7680 x 4320 (30 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1920 x 1080 (1920 fps) (Full HD) slow motion video | 1280 x 720 (120 fps) (HD) slow motion video |
| 12.87 | 11 |
| Networks | |
| -- | Wi-Fi |
| -- | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G) and HSDPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSPA |
| Nano SIM | Nano SIM |
| 7.6 | 6.6 |
| Battery Life | |
| 6000mAh Si - Carbon Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 7.52 | 5.92 |
| Other Features | |
| Bluetooth 5.4 | Bluetooth 5.2 |
| GPS | GPS |
| NFC | -- |
| Infra-red port | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
Comparison review
Xiaomi 15 Ultra (Rumored) has a score of 80.1, which is a little bit better than Xiaomi Redmi Note 8 2021's overall score of 76.7. Both of these devices work with Android OS (Operating System), but the Xiaomi 15 Ultra (Rumored) has the newer 15 version and Xiaomi Redmi Note 8 2021 has Android 11, giving you some nice extra features. The Xiaomi 15 Ultra (Rumored) construction is much thinner and noticeably lighter than Xiaomi Redmi Note 8 2021.
Xiaomi Redmi Note 8 2021 has a lot better screen than Xiaomi 15 Ultra (Rumored), although it has a little smaller display. The Xiaomi 15 Ultra (Rumored) features a superior storage to store more apps and games than Xiaomi Redmi Note 8 2021, because although it has no external memory card slot, it also counts with 448 GB more internal storage.
Xiaomi Redmi Note 8 2021 has a really superior processing power than Xiaomi 15 Ultra (Rumored), although it has a smaller amount of RAM, they both have the same number of cores. Xiaomi 15 Ultra (Rumored) features a better camera than Xiaomi Redmi Note 8 2021, because it has a way better video quality and a back camera with way more mega pixels.
Xiaomi 15 Ultra (Rumored) has a way better battery life than Xiaomi Redmi Note 8 2021, because it has a 50 percent greater battery size.
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