Compare phones
| Global Score | |
| 11.67 | 8.91 |
| Basic Information | |
| Samsung | LG |
| Android 11 | Android 10 |
| 2021-01-29 | 2020-05-06 |
| 6.50 x 2.98 x 0.35 inches | 6.57 x 3.07 x 0.33 inches |
| 8.04 ounces | 7.17 ounces |
| Phantom black and Silver | Titan gray |
| Aluminum and Glass (Corning Gorilla Glass Victus) | -- |
| Scratch-Resistant Glass | -- |
| $ 966.00 | $ 174.00 |
| Display / Screen | |
| 6.8 inches | 6.5 inches |
| 3200 x 1440 pixels | 1560 x 720 pixels |
| Dynamic AMOLED | IPS LCD |
| 516 pixels per inch | 264 pixels per inch |
| 1500 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 9.8 | 7.2 |
| Performance | |
| Qualcomm Snapdragon 888 chipset | MediaTek Helio P22 MT6762 chipset |
| Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2000 MHz) processor |
| 12 GB RAM | 3 GB RAM |
| Adreno 660 GPU | IMG PowerVR GE8320 GPU |
| 9.72 | 9.09 |
| Storage | |
| 128 GB internal memory | 32 GB internal memory |
| No SD card slot | microSDXC (up to 1,95 TB) external memory slot |
| 10.1 | 12.76 |
| Camera | |
| 108.00 MP + 40.00 MP | 13.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 24.00mm focal length | -- |
| 0.75 inches (1/1.33") sensor | 0.33 inches (1/3") sensor |
| 7680 x 4320 (24 fps) video resolution | 1920 x 1080 (Full HD) video resolution |
| 1280 x 720 (960 fps) (HD) slow motion video | -- |
| 13.75 | 8.14 |
| 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 |
| 10.7 | 6.7 |
| Battery Life | |
| 5000mAh Li - Polymer Battery | 4000mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 4.96 | 4.8 |
| Other Features | |
| Bluetooth 5.1 | Bluetooth 5.0 |
| GPS | GPS |
| 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 | FM Radio |
Comparison review
The Samsung Galaxy S21 Ultra has a score of 11.67, which is a lot better than the LG K51's 8.91 overall score. Both of these devices use Android OS, but the Samsung Galaxy S21 Ultra has newer 11 version and LG K51 has Android 10 version. The Samsung Galaxy S21 Ultra construction is just a bit thicker and somewhat heavier than LG K51.
Samsung Galaxy S21 Ultra features a much sharper screen than LG K51, because it has a lot greater screen pixel density, a quite larger screen and a much better 1440 x 3200px resolution. The LG K51 counts with a much bigger memory capacity to install games and applications than Galaxy S21 Ultra, because although it has just 32 GB internal memory capacity, it also counts with a slot for SD memory cards that admits a maximum of 1,95 TB.
Galaxy S21 Ultra counts with a bit faster CPU than LG K51, and although they both have the same number of cores, the Galaxy S21 Ultra also has a larger amount of RAM. Samsung Galaxy S21 Ultra features just a bit better battery lifetime than LG K51, because it has a 25% larger battery capacity. The Galaxy S21 Ultra features a way better camera than LG K51, and although they both have a F1.8 aperture, the Galaxy S21 Ultra also has a way larger sensor providing a way better image quality, a much more megapixels back-facing camera and a much higher 7680x4320 video quality.
Although Samsung Galaxy S21 Ultra is a better device, it costs a lot more than LG K51, and it doesn't have such a good relation between it's price and quality as the LG K51. If you are trying to save some money, you can buy LG K51, giving up a few features and specs, but you'll get the most with your budget.