Compare phones

Global Score
Basic Information
Android 11Android 10
6.50 x 2.98 x 0.35 inches6.39 x 3.04 x 0.38 inches
8.04 ounces6.98 ounces
Phantom black and SilverCool blue, Power black and Yellow
Aluminum and Glass (Corning Gorilla Glass Victus)Plastic and Plastic
Scratch-Resistant GlassScratch-Resistant Glass
$ 966.00$ 149.00
Display / Screen
6.8 inches6.5 inches
3200 x 1440 pixels 2340 x 1080 pixels
516 pixels per inch396 pixels per inch
1500 cd/m2 brightness--
No touch screenNo touch screen
Qualcomm Snapdragon 888 chipsetQualcomm Snapdragon 662 SM6115 chipset
Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processorKryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor
Adreno 660 GPUAdreno 610 GPU
128 GB internal memory64 GB internal memory
No SD card slotmicroSDXC (up to 512 GB) external memory slot
108.00 MP + 40.00 MP48.00 MP + 8.00 MP
f/1.80 aperturef/1.80 aperture
24.00mm focal length--
0.75 inches (1/1.33") sensor0.5 inches (1/2") sensor
7680 x 4320 (24 fps) video resolution1920 x 1080 (30 fps) (Full HD) video resolution
1280 x 720 (960 fps) (HD) slow motion video--
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, Dual SIM
Battery Life
5000mAh Li - Polymer Battery6000mAh Battery
Non-Removable BatteryNon-Removable Battery
Wireless Charging--
Other Features
Bluetooth 5.1 Bluetooth 5.0
--Infra-red port
Fingerprint ID ScannerFingerprint ID Scanner
Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity SensorAccelerometer, Compass, Light Sensor and Proximity Sensor
FM RadioFM Radio

Comparison review

Galaxy S21 Ultra has a general score of 11.67, which is a lot better than the Xiaomi Poco M3's 9.31 overall score. These devices come with Android OS, but the Galaxy S21 Ultra has the newer 11 version while Xiaomi Poco M3 has Android 10, so it provides you a couple nice extra features. The Galaxy S21 Ultra design is somewhat heavier but a little bit thinner than Xiaomi Poco M3, and both of them were released only a couple months apart.

Samsung Galaxy S21 Ultra features a way better display than Xiaomi Poco M3, because it has a higher 1440 x 3200 resolution, a higher display density and a little larger display. Xiaomi Poco M3 counts with a better memory capacity to install applications and games than Samsung Galaxy S21 Ultra, because although it has only 64 GB internal memory, it also counts with a SD memory slot that admits a maximum of 512 GB.

The Samsung Galaxy S21 Ultra has just a bit better hardware performance than Xiaomi Poco M3, and although they both have the same number of cores, the Samsung Galaxy S21 Ultra also has a greater amount of RAM. The Xiaomi Poco M3 features a much better battery duration than Samsung Galaxy S21 Ultra, because it has 6000mAh of battery capacity against 5000mAh.

Samsung Galaxy S21 Ultra shoots a lot better videos and photos than Xiaomi Poco M3, and although they both have the same aperture, the Samsung Galaxy S21 Ultra also has a back-facing camera with a lot better resolution, a lot better 7680x4320 video quality and a lot larger sensor shooting way higher quality videos and pictures.

Although Samsung Galaxy S21 Ultra is a better device, it costs a lot more than the Xiaomi Poco M3, and it doesn't have such a good relation between it's price and quality as Xiaomi Poco M3. If you want to save a few dollars, you can buy the Xiaomi Poco M3, letting go a few specs and features, but you'll get the most with your money.