Compare phones
| Global Score | |
| 71.8 | 98.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 6.0 Marshmallow | Android 11 |
| 2017-02-14 | 2021-01-29 |
| 5.94 x 2.99 x 0.33 inches | 6.50 x 2.98 x 0.35 inches |
| 5.82 ounces | 8.04 ounces |
| 16 777 216 | Phantom black and Silver |
| Metal | Aluminum and Glass (Corning Gorilla Glass Victus) |
| -- | Scratch-Resistant Glass |
| $ 145.00 | $ 966.00 |
| Display / Screen | |
| 5.5 inches | 6.8 inches |
| 1920 x 1080 pixels (Full HD) | 3200 x 1440 pixels |
| IPS LCD | Dynamic AMOLED |
| 401 pixels per inch | 516 pixels per inch |
| -- | 1500 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 9.8 |
| Performance | |
| Qualcomm Snapdragon 625 8953 chipset | Qualcomm Snapdragon 888 chipset |
| ARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2000 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 12 GB RAM |
| Adreno 506 GPU | Adreno 660 GPU |
| 9.09 | 9.72 |
| Storage | |
| 32 GB internal memory | 128 GB internal memory |
| microSDXC (up to 128 GB) external memory slot | No SD card slot |
| 8.12 | 10.1 |
| Camera | |
| 13.00 MP + 5.00 MP | 108.00 MP + 40.00 MP |
| f/2.00 aperture | f/1.80 aperture |
| -- | 24.00mm focal length |
| -- | 0.75 inches (1/1.33") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| 1280 x 720 (120 fps) (HD) slow motion video | 1280 x 720 (960 fps) (HD) slow motion video |
| 9.02 | 13.75 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G) and HSPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM | Nano SIM |
| 6.1 | 10.7 |
| Battery Life | |
| 4100mAh Li - Polymer Battery | 5000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 6 | 6.8 |
| Other Features | |
| Bluetooth 4.2 | Bluetooth 5.1 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Galaxy S21 Ultra is much better than Xiaomi Redmi Note 4X, getting a global score of 98.1 against 71.8. Galaxy S21 Ultra is a a lot newer cellphone than the Xiaomi Redmi Note 4X, but it's just a little thicker and much heavier. Both phones in this comparison work with Android operating system, but Galaxy S21 Ultra has older 11 version while Xiaomi Redmi Note 4X has Android 6.0 Marshmallow.
The Galaxy S21 Ultra features a way better screen than Xiaomi Redmi Note 4X, because it has a larger screen, a way higher resolution of 1440 x 3200 pixels and a greater number of pixels per display inch. The Samsung Galaxy S21 Ultra features a much greater memory to install applications and games or saving photos and videos than Xiaomi Redmi Note 4X, because although it has no SD extension slot, it also counts with 96 GB more internal storage capacity.
Galaxy S21 Ultra counts with a little faster CPU than Xiaomi Redmi Note 4X, and although they both have a Octa-Core processor, the Galaxy S21 Ultra also has 9 GB more RAM. The Samsung Galaxy S21 Ultra counts with better battery lifetime than Xiaomi Redmi Note 4X, because it has a 5000mAh battery size.
The Galaxy S21 Ultra shoots a lot better pictures and videos than Xiaomi Redmi Note 4X, because it has a back-facing camera with a way better resolution, a larger aperture to capture better photos and video in poorly lited environments and a much higher video definition.
Although Galaxy S21 Ultra is a better device, it is a lot more expensive than Xiaomi Redmi Note 4X, and it doesn't have such a good quality/price relation as the Xiaomi Redmi Note 4X. If you prefer to save a few dollars, you can get Xiaomi Redmi Note 4X, letting go a few specs and features, but you'll get the most with your savings.
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