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Global Score
11.678.97
Basic Information
SamsungXiaomi
Android 11Android 9.0 Pie, 8.1 Oreo, 8.0 Oreo, 7.1 Nougat
2021-01-292017-09-12
6.50 x 2.98 x 0.35 inches6.12 x 2.98 x 0.29 inches
8.04 ounces5.82 ounces
Phantom black and SilverBlack, Gold and Pink
Aluminum and Glass (Corning Gorilla Glass Victus)Metal
Scratch-Resistant Glass--
$ 966.00--
Display / Screen
6.8 inches5.5 inches
3200 x 1440 pixels 1920 x 1080 pixels (Full HD)
Dynamic AMOLED IPS LCD
516 pixels per inch401 pixels per inch
1500 cd/m2 brightness450 cd/m2 brightness
No touch screenNo touch screen
9.88.4
Performance
Qualcomm Snapdragon 888 chipsetQualcomm Snapdragon 625 8953 chipset
Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processorARM Cortex-A53, 64-bit, 14 nm (Octa-Core 2000 MHz) processor
12 GB RAM4 GB RAM
Adreno 660 GPUAdreno 506 GPU
9.729.09
Storage
128 GB internal memory64 GB internal memory
No SD card slotmicroSDXC (up to 256 GB) external memory slot
10.110.78
Camera
108.00 MP + 40.00 MP12.00 MP + 5.00 MP
f/1.80 aperturef/2.20 aperture
24.00mm focal length26.00mm focal length
0.75 inches (1/1.33") sensor--
7680 x 4320 (24 fps) video resolution3840 x 2160 (30 fps) (4K) video resolution
1280 x 720 (960 fps) (HD) slow motion video1280 x 720 (120 fps) (HD) slow motion video
13.759.35
Networks
Wi-FiWi-Fi
Mobile HotspotMobile Hotspot
5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPALTE (4G), HSPA and HSUPA
Nano SIMNano SIM
10.76.1
Battery Life
5000mAh Li - Polymer Battery3080mAh Li - Ion Battery
Non-Removable BatteryNon-Removable Battery
Wireless Charging--
4.964.48
Other Features
Bluetooth 5.1 Bluetooth 4.2
GPSGPS
NFC--
--Infra-red port
Fingerprint ID ScannerFingerprint ID Scanner
Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity SensorAccelerometer, Gyroscope, Light Sensor and Proximity Sensor
FM RadioFM Radio

Comparison review

The Samsung Galaxy S21 Ultra is way better than the Xiaomi Mi A1, having a general score of 11.67 against 8.97. Both phones in our current comparison come with Android OS (Operating System), but the Samsung Galaxy S21 Ultra has an older 11 version and Xiaomi Mi A1 has Android 9.0 Pie version. Samsung Galaxy S21 Ultra's design is much newer than the Xiaomi Mi A1's, although it is somewhat thicker and a lot heavier.

The Samsung Galaxy S21 Ultra counts with a bit faster processing unit than Xiaomi Mi A1, and although they both have the same number of cores, the Samsung Galaxy S21 Ultra also has 8 GB more RAM memory. Galaxy S21 Ultra features a more vivid screen than Xiaomi Mi A1, because it has a bigger screen, a way better 1440 x 3200 resolution, way more brightness and more pixels per inch of display.

Galaxy S21 Ultra counts with a lot better camera than Xiaomi Mi A1, because it has a bigger camera aperture, a way higher 108 megapixels resolution camera and a way higher video definition. Xiaomi Mi A1 features a bit more storage capacity for apps and games than Samsung Galaxy S21 Ultra, because although it has 0 less internal memory capacity, it also counts with a SD memory card expansion slot that supports a maximum of 256 GB.

The Samsung Galaxy S21 Ultra features improved battery performance than Xiaomi Mi A1, because it has a 5000mAh battery size.