| Global Score | |
| 74.3 | 76.7 |
| Basic Information | |
| LG | Xiaomi |
| Android 10 | Android 12 |
| 2020-04-27 | 2022-03-23 |
| 6.50 x 3.02 x 0.33 inches | 6.46 x 3.00 x 0.32 inches |
| 6.77 ounces | 7.23 ounces |
| Blue, Pink and Titanium | Laser Black, Laser Blue and POCO Yellow |
| -- | Scratch-Resistant Glass |
| $ 190.00 | -- |
| Display / Screen | |
| 6.5 inches | 6.7 inches |
| 1600 x 720 pixels | 2400 x 1080 pixels |
| IPS LCD | AMOLED |
| 270 pixels per inch | 393 pixels per inch |
| -- | 1200 cd/m2 brightness |
| No touch screen | No touch screen |
| 7.3 | 8.9 |
| Performance | |
| MediaTek Helio P35 MT6765 chipset | Qualcomm Snapdragon 696 SM6375 (6 nm) chipset |
| Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor | processor |
| 3 GB RAM | 6 GB RAM |
| PowerVR GE8320 GPU | Adreno 619 GPU |
| 9.27 | 6.12 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 2 TB) external memory slot | microSDXC (up to 1 TB) external memory slot |
| 14.74 | 15.42 |
| Camera | |
| 32.00 MP + 13.00 MP | 108.00 MP + 16.00 MP |
| -- | f/1.90 aperture |
| 1920 x 1080 (30 fps) (Full HD) video resolution | -- |
| 8.91 | 10.34 |
| 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) and HSDPA |
| Nano SIM, Dual SIM | Nano SIM |
| 6.7 | 10.6 |
| Battery Life | |
| 4000mAh Battery | 5000mAh Nano SIM Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 6.8 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.1 |
| GPS | GPS |
| NFC | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope, Light Sensor and Proximity Sensor |
Xiaomi POCO X4 Pro 5G has an overall score of 76.7, which is a bit better than LG K51S's overall score of 74.3. Xiaomi POCO X4 Pro 5G's body is newer and just a little bit thinner, but just a little heavier than the LG K51S. Both of these phones come with Android OS (Operating System), but Xiaomi POCO X4 Pro 5G has the newer 12 version and LG K51S has Android 10.
LG K51S features a much powerful processing unit than Xiaomi POCO X4 Pro 5G, although it has a smaller amount of RAM, they both have 8 processing cores. The Xiaomi POCO X4 Pro 5G has a lot better screen than LG K51S, because it has a little bit bigger display, a way higher 1080 x 2400 resolution and more pixels per inch in the screen.
Xiaomi POCO X4 Pro 5G counts with a superior camera than LG K51S, because it has a camera with much more MP. Xiaomi POCO X4 Pro 5G has a bit bigger storage capacity to install games and applications than LG K51S, because although it has an external SD slot that supports 1 TB smaller, it also counts with 64 GB more internal memory capacity.
Xiaomi POCO X4 Pro 5G features longer battery lifetime than LG K51S, because it has a 25 percent larger battery capacity.
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