Search


Compare phones

Global Score
11.679.45
Basic Information
SamsungXiaomi
Android 11Android 11, 10, 9.0 Pie
2021-01-292019-07-24
6.50 x 2.98 x 0.35 inches6.04 x 2.83 x 0.33 inches
8.04 ounces6.13 ounces
Phantom black and SilverBlue, Gray and White
Aluminum and Glass (Corning Gorilla Glass Victus)Glass (Corning Gorilla Glass 5) and Plastic
Scratch-Resistant GlassScratch-Resistant Glass
$ 966.00--
Display / Screen
6.8 inches6.1 inches
3200 x 1440 pixels 1560 x 720 pixels
Dynamic AMOLED Super AMOLED
516 pixels per inch282 pixels per inch
1500 cd/m2 brightness--
No touch screenNo touch screen
9.87.3
Performance
Qualcomm Snapdragon 888 chipsetQualcomm Snapdragon 665 chipset
Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processorKryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor
12 GB RAM4 GB RAM
Adreno 660 GPUAdreno 610 GPU
9.729.09
Storage
128 GB internal memory128 GB internal memory
No SD card slotmicroSDXC (up to 256 GB) external memory slot
10.113.18
Camera
108.00 MP + 40.00 MP48.00 MP + 32.00 MP
f/1.80 aperturef/1.80 aperture
24.00mm focal length--
0.75 inches (1/1.33") sensor0.43 inches (1/2.3") 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 (240 fps) (HD) slow motion video
13.7511.44
Networks
Wi-FiWi-Fi
Mobile HotspotMobile Hotspot
5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPALTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA
Nano SIMNano SIM
10.76.7
Battery Life
5000mAh Li - Polymer Battery4030mAh Battery
Non-Removable BatteryNon-Removable Battery
Wireless Charging--
4.964.96
Other Features
Bluetooth 5.1 Bluetooth 5.0
GPSGPS
NFC--
--Infra-red port
Fingerprint ID ScannerFingerprint ID Scanner
Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity SensorAccelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor
FM RadioFM Radio

Comparison review

The Samsung Galaxy S21 Ultra has a score of 11.67, which is much better than the Xiaomi Mi A3's score of 9.45. Samsung Galaxy S21 Ultra's body is newer than Xiaomi Mi A3's, but it's just a bit thicker and much heavier. These phones come with the same Android 11 operating system. The Samsung Galaxy S21 Ultra has just a bit better hardware performance than Xiaomi Mi A3, and although they both have 8 CPU cores, the Samsung Galaxy S21 Ultra also has 8 GB more RAM memory.

Galaxy S21 Ultra features a lot better looking screen than Xiaomi Mi A3, because it has a little bit larger screen, a much higher resolution of 1440 x 3200 pixels and a much better count of pixels per inch in the screen. The Galaxy S21 Ultra takes a lot better photographs and videos than Xiaomi Mi A3, and although they both have a F1.8 aperture, the Galaxy S21 Ultra also has a lot higher resolution back facing camera, a much higher 7680x4320 video quality and a lot larger sensor capturing more light and vivid colors.

Xiaomi Mi A3 has a much greater storage for games and applications than Samsung Galaxy S21 Ultra, and although they both have exactly the same 128 GB internal memory, the Xiaomi Mi A3 also has an external memory slot that allows up to 256 GB. The Xiaomi Mi A3's battery lifetime is just as good as the Samsung Galaxy S21 Ultra one, although the Xiaomi Mi A3 has a 19 percent lower battery size.