| Global Score | |
| 73.7 | 84.1 |
| Basic Information | |
| LG | Samsung |
| Android 4.4.2, 4.2.2 | Android 11, 10 |
| 2013-08-07 | 2020-03-23 |
| 5.45 x 2.79 x 0.35 inches | 6.26 x 2.96 x 0.35 inches |
| 5.04 ounces | 6.63 ounces |
| Black and White | Midnight blue and Raven black |
| -- | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 159.00 | -- |
| Display / Screen | |
| 5.2 inches | 6.4 inches |
| 1080 x 1920 pixels (Full HD) | 2340 x 1080 pixels |
| IPS LCD | Super AMOLED |
| 424 pixels per inch | 403 pixels per inch |
| 450 cd/m2 brightness | 420 cd/m2 brightness |
| Capacitive, Multi-touch | No touch screen |
| 9.5 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 800 MSM8974 chipset | Exynos 9611 chipset |
| Krait 400 (Quad-Core 2260 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 2 GB (800 MHz) RAM | 4 GB RAM |
| Adreno 330 (450 MHz) GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| No SD card slot | microSDXC (up to 512 GB) external memory slot |
| 5.8 | 11.74 |
| Camera | |
| 13.00 MP + 2.10 MP | 48.00 MP + 20.00 MP |
| f/2.40 aperture | f/2.00 aperture |
| 29.00mm focal length | 26.00mm focal length |
| 0.33 inches (1/3.06") sensor | 0.5 inches (1/2") sensor |
| 1920 x 1080 (60 fps) (Full HD) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| -- | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 9.24 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, EDGE, GPRS, GSM and CDMA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM | Nano SIM, Dual SIM |
| 7.1 | 6.7 |
| Battery Life | |
| 3000mAh Li-Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| Wireless Charging | -- |
| 696 hours standby time 17.9 hours talk time | -- |
| 4.96 | 7.52 |
| Other Features | |
| Bluetooth 4.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Infra-red port | -- |
| -- | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
The Galaxy M21 is better than the LG G2, with an 84.1 score against 73.7. The Galaxy M21 design has the same thickness than LG G2, but it's much heavier. These phones include Android operating system, but Galaxy M21 has the previous 11 version and LG G2 has Android 4.4.2. The LG G2 and the Galaxy M21 have extremely similar CPUs, because although the Galaxy M21 has doesn't have an extra GPU, it also counts with 2 GB more RAM and a larger number of faster cores.
LG G2 counts with a better looking screen than Galaxy M21, because although it has a quite smaller display and a bit worse resolution of 1920 x 1080px, it also counts with a bit more brightness and a just a bit more pixels per screen inch. Samsung Galaxy M21 captures way better videos and photos than LG G2, because it has a back-facing camera with a way better 48 mega-pixels resolution, a bigger aperture, a lot larger sensor taking more light and vivid colors and a way higher video resolution.
Samsung Galaxy M21 counts with a very superior memory for apps and games than LG G2, because it has 32 GB more internal memory capacity. Samsung Galaxy M21 features a really longer battery life than LG G2, because it has 6000mAh of battery capacity instead of 3000mAh.
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