Compare phones

Global Score
Basic Information
Android 11Android 11, 10
6.50 x 2.98 x 0.35 inches6.37 x 2.98 x 0.36 inches
8.04 ounces6.68 ounces
Phantom black and SilverPearl white
Aluminum and Glass (Corning Gorilla Glass Victus)Plastic
Scratch-Resistant Glass--
$ 966.00$ 200.00
Display / Screen
6.8 inches6.4 inches
3200 x 1440 pixels 1560 x 720 pixels
516 pixels per inch268 pixels per inch
1500 cd/m2 brightness--
No touch screenNo touch screen
Qualcomm Snapdragon 888 chipsetQualcomm Snapdragon 665 SM6125 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 memory32 GB internal memory
No SD card slotmicroSDXC (up to 512 GB) external memory slot
108.00 MP + 40.00 MP16.00 MP + 8.00 MP
f/1.80 aperturef/1.70 aperture
24.00mm focal length--
0.75 inches (1/1.33") sensor0.36 inches (1/2.8") sensor
7680 x 4320 (24 fps) video resolution3840 x 2160 (30 fps) (4K) video resolution
1280 x 720 (960 fps) (HD) slow motion video1920 x 1080 (60 fps) (Full 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
Battery Life
5000mAh Li - Polymer Battery4000mAh Battery
Non-Removable BatteryNon-Removable Battery
Wireless Charging--
Other Features
Bluetooth 5.1 Bluetooth 5.0
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

Samsung Galaxy S21 Ultra is much better than the Motorola Moto G Fast, having a 11.67 score against 9.06. Even though Samsung Galaxy S21 Ultra and the Motorola Moto G Fast were released only a couple months apart, Samsung Galaxy S21 Ultra's design is just a little bit thinner but somewhat heavier. Both devices in our current comparison use the same Android 11 OS.

The Samsung Galaxy S21 Ultra features just a bit better processing power than Motorola Moto G Fast, and although they both have 8 CPU cores, the Samsung Galaxy S21 Ultra also has more RAM. The Galaxy S21 Ultra counts with a much better display than Moto G Fast, because it has a little bit bigger screen, a much better resolution of 1440 x 3200 and a much higher pixel density.

Galaxy S21 Ultra counts with just a bit bigger storage for games and applications than Moto G Fast, because although it has no slot for external memory cards, it also counts with more internal storage capacity. Galaxy S21 Ultra counts with a greater camera than Moto G Fast, because although it has a smaller aperture, it also counts with a lot larger back-facing camera sensor capturing way better quality photos and videos, a much higher video definition and a way higher 108 mega-pixels resolution back camera.

Samsung Galaxy S21 Ultra has a little longer battery lifetime than Moto G Fast, because it has a 25 percent more battery capacity.

Although Galaxy S21 Ultra is a better device, it costs a lot more money than Moto G Fast, and it doesn't have such a good quality/price relation as Moto G Fast. If you want to save some money, you can get Moto G Fast, giving up a few features and specs, but you will get the most out of your savings.