Compare phones
| Global Score | |
| 74.3 | 91.8 |
| Basic Information | |
| LG | Samsung |
| Android 10 | Android 11 |
| 2020-04-27 | 2021-01-29 |
| 6.50 x 3.02 x 0.33 inches | 5.97 x 2.80 x 0.31 inches |
| 6.77 ounces | 6.03 ounces |
| Blue, Pink and Titanium | Gray, Phantom pink, Violet and White |
| -- | Aluminum and Plastic |
| -- | Scratch-Resistant Glass |
| $ 190.00 | $ 722.00 |
| Display / Screen | |
| 6.5 inches | 6.2 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| IPS LCD | Dynamic AMOLED |
| 270 pixels per inch | 424 pixels per inch |
| -- | 1300 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.3 | 9.2 |
| Performance | |
| MediaTek Helio P35 MT6765 chipset | Qualcomm Snapdragon 888 chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | Kryo 680, 64-bit, 5 nm (Octa-Core 2840 MHz) processor |
| 3 GB RAM | 8 GB RAM |
| PowerVR GE8320 GPU | Adreno 660 GPU |
| 9.27 | 9.63 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 2 TB) external memory slot | No SD card slot |
| 14.74 | 10.1 |
| Camera | |
| 32.00 MP + 13.00 MP | 12.00 MP + 10.00 MP |
| -- | f/1.80 aperture |
| -- | 26.00mm focal length |
| -- | 0.57 inches (1/1.76") sensor |
| 1920 x 1080 (30 fps) (Full HD) video resolution | 7680 x 4320 (24 fps) video resolution |
| -- | 1280 x 720 (960 fps) (HD) slow motion video |
| 8.91 | 10.78 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | 5G, 5G, LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 10.7 |
| Battery Life | |
| 4000mAh Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| -- | Wireless Charging |
| 5.92 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| -- | FM Radio |
Comparison review
Samsung Galaxy S21 has a score of 91.8, which is way better than LG K51S's 74.3 general score. Samsung Galaxy S21 is a newer phone, and it's also just a little thinner and lighter than LG K51S. These phones come with Android OS (operating system), but the Samsung Galaxy S21 has the newer 11 version while LG K51S has Android 10 version.
The Samsung Galaxy S21 counts with a much better looking screen than LG K51S, because although it has a bit smaller screen, it also counts with a lot better count of pixels per inch in the screen and a much better 1080 x 2400px resolution. The LG K51S has a way bigger memory capacity to install applications and games or saving photos and videos than Galaxy S21, because although it has less internal storage, it also counts with a SD card slot that allows up to 2 TB.
The Samsung Galaxy S21 has a bit better CPU than LG K51S, and although they both have a Octa-Core processor, the Samsung Galaxy S21 also has 5 GB more RAM memory. LG K51S and Galaxy S21 feature incredibly similar battery durations. The Samsung Galaxy S21 takes greater pictures and videos than LG K51S, because although it has a back-facing camera with lot less mega pixels, it also counts with a lot better 7680x4320 video resolution.
Although Samsung Galaxy S21 is a better device, it costs a lot more money than the LG K51S, and it doesn't have such a good quality/price relation as LG K51S. If you are trying to save some dollars, you can buy LG K51S, letting go a couple features, but you'll get the most out of your budget.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.