| Global Score | |
| 80.1 | 89.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 15 | Android 11 |
| -- | 2022-01-11 |
| -- | 6.13 x 2.93 x 0.31 inches |
| -- | 6.00 ounces |
| -- | Metal and Plastic |
| -- | Scratch-Resistant Glass |
| -- | $ 700.00 |
| Display / Screen | |
| 6.7 inches | 6.4 inches |
| -- | 2340 x 1080 pixels |
| AMOLED | Dynamic AMOLED |
| -- | 403 pixels per inch |
| 3000 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 5 | 8.2 |
| Performance | |
| Qualcomm Snapdragon 8 Elite SM8750-AB (4 nm) chipset | Qualcomm Snapdragon 888 SM8350 (5 nm) chipset |
| processor | Kryo 680 Prime, 64-bit (Octa-Core 2840 MHz) processor |
| 16 GB RAM | 6 GB RAM |
| Adreno 830 GPU | Adreno 660 GPU |
| 6.3 | 9.63 |
| Storage | |
| 512 GB internal memory | 128 GB internal memory |
| No SD card slot | No SD card slot |
| 17.6 | 10.1 |
| Camera | |
| 200.00 MP + 32.00 MP | 12.00 MP + 32.00 MP |
| -- | f/1.80 aperture |
| -- | 26.00mm focal length |
| 7680 x 4320 (30 fps) video resolution | 3840 x 2160 (60 fps) (4K) video resolution |
| 1920 x 1080 (1920 fps) (Full HD) slow motion video | -- |
| 12.87 | 9.9 |
| 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, Dual SIM |
| 7.6 | 10.6 |
| Battery Life | |
| 6000mAh Si - Carbon Battery | 4500mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | Wireless Charging |
| 7.52 | 6.32 |
| Other Features | |
| Bluetooth 5.4 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| 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 |
| -- | FM Radio |
The Samsung Galaxy S21 FE is much better than Xiaomi 15 Ultra (Rumored), with a general score of 89.1 against 80.1. These phones have Android OS (Operating System), but the Samsung Galaxy S21 FE has the older 11 version and Xiaomi 15 Ultra (Rumored) has Android 15 version. The Galaxy S21 FE has a very superior CPU than Xiaomi 15 Ultra (Rumored), although it has a smaller amount of RAM memory, they both have the same number of cores.
The Samsung Galaxy S21 FE counts with a much more vibrant display than Xiaomi 15 Ultra (Rumored), although it has a little bit smaller display. The Xiaomi 15 Ultra (Rumored) shoots much better photographs and videos than Galaxy S21 FE, because it has a much higher 200 mega pixels resolution camera and a way higher 7680x4320 video definition.
Xiaomi 15 Ultra (Rumored) features much more storage to install applications and games or saving photos and videos than Samsung Galaxy S21 FE, because it has more internal storage capacity. Xiaomi 15 Ultra (Rumored) has greater battery lifetime than Galaxy S21 FE, because it has a 33% greater battery capacity.
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