Compare phones
| Global Score | |
| 11.67 | 9.31 |
| Basic Information | |
| Samsung | LG |
| Android 11 | Android 10 |
| 2021-01-29 | 2020-04-27 |
| 6.50 x 2.98 x 0.35 inches | 6.50 x 3.02 x 0.33 inches |
| 8.04 ounces | 6.77 ounces |
| Phantom black and Silver | Blue, Pink and Titanium |
| Aluminum and Glass (Corning Gorilla Glass Victus) | -- |
| Scratch-Resistant Glass | -- |
| $ 966.00 | $ 190.00 |
| Display / Screen | |
| 6.8 inches | 6.5 inches |
| 3200 x 1440 pixels | 1600 x 720 pixels |
| Dynamic AMOLED | IPS LCD |
| 516 pixels per inch | 270 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | MediaTek Helio P35 MT6765 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 12 GB RAM | 3 GB RAM |
| Adreno 660 GPU | PowerVR GE8320 GPU |
| 9.72 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 2 TB) external memory slot |
| 10.1 | 14.74 |
| Camera | |
| 108.00 MP + 40.00 MP | 32.00 MP + 13.00 MP |
| f/1.80 aperture | -- |
| 24.00mm focal length | -- |
| 0.75 inches (1/1.33") sensor | -- |
| 7680 x 4320 (24 fps) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 13.75 | 8.91 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM | Nano SIM, Dual SIM |
| 10.7 | 6.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4000mAh Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.96 | 4.64 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
Comparison review
Samsung Galaxy S21 Ultra is a lot better than LG K51S, with a general score of 11.67 against 9.31. Both of these devices come with Android operating system, but Samsung Galaxy S21 Ultra has newer 11 version and LG K51S has Android 10. The Samsung Galaxy S21 Ultra is a newer cellphone than LG K51S, although it is just a bit thicker and somewhat heavier.
The Galaxy S21 Ultra has just a bit better performance than LG K51S, and although they both have the same number of cores, the Galaxy S21 Ultra also has a higher amount of RAM. Galaxy S21 Ultra counts with an incredibly better screen than LG K51S, because it has a way higher display pixels density, a bit larger display and a way better 1440 x 3200 resolution.
LG K51S has a lot bigger memory for apps and games than Galaxy S21 Ultra, because although it has just 64 GB internal memory, it also counts with a slot for SD memory cards that allows a maximum of 2 TB. Galaxy S21 Ultra captures way better videos and photos than LG K51S, because it has a way higher video definition and a lot higher resolution camera.
Samsung Galaxy S21 Ultra counts with a bit better battery lifetime than LG K51S, because it has a 25% bigger battery capacity.
Although Samsung Galaxy S21 Ultra is a better device, it is way more expensive than the LG K51S, and it doesn't have such a good relation between it's price and quality as LG K51S. So if you want that extra specs, you can buy the Samsung Galaxy S21 Ultra, but if you don't you can save a couple dollars and buy the LG K51S, letting go a couple specifications.