| Global Score | |
| 84.1 | 76.4 |
| Basic Information | |
| Samsung | LG |
| Android 11, 10 | Android 5.0, 4.4.2 |
| 2020-03-23 | 2014-05-27 |
| 6.26 x 2.96 x 0.35 inches | 5.76 x 2.94 x 0.35 inches |
| 6.63 ounces | 5.26 ounces |
| Midnight blue and Raven black | Black, Gold, Pink, Purple and White |
| Plastic and Plastic | -- |
| Scratch-Resistant Glass | -- |
| -- | $ 155.00 |
| Display / Screen | |
| 6.4 inches | 5.5 inches |
| 2340 x 1080 pixels | 1440 x 2560 pixels (Quad HD / 2K) |
| Super AMOLED | IPS LCD |
| 403 pixels per inch | 534 pixels per inch |
| 420 cd/m2 brightness | 450 cd/m2 brightness |
| No touch screen | Capacitive, Multi-touch |
| 8.4 | 10 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 801 8974-AC chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Krait 400 (Quad-Core 2500 MHz) processor |
| 4 GB RAM | 3 GB (800 MHz) RAM |
| Mali-G72 MP3 GPU | Adreno 330 (450 MHz) GPU |
| 9.27 | 9.45 |
| Storage | |
| 64 GB internal memory | 32 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSD, microSDHC, microSDXC (up to 128 GB) external memory slot |
| 11.74 | 8.12 |
| Camera | |
| 48.00 MP + 20.00 MP | 13.00 MP + 2.10 MP |
| f/2.00 aperture | f/2.40 aperture |
| 26.00mm focal length | -- |
| 0.5 inches (1/2") sensor | 0.33 inches (1/3.06") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (240 fps) (Full HD) slow motion video | -- |
| 11.55 | 9.46 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE (4G), HSPA+ (4G), HSDPA, HSUPA, UMTS, EDGE, GPRS and GSM |
| Nano SIM, Dual SIM | Micro SIM |
| 6.7 | 7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3000mAh Li-Ion Battery |
| Non-Removable Battery | Removable Battery |
| -- | Wireless Charging |
| -- | 548 hours standby time 19 hours talk time |
| 7.52 | 4.96 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.0 |
| GPS | GPS |
| -- | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | -- |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
The Galaxy M21 has an overall score of 84.1, which is much better than the LG G3's score of 76.4. The Galaxy M21 is a heavier phone than LG G3, but both of them have the same thickness. Both phones in our current comparison include Android OS (operating system), but Galaxy M21 has a more recent 11 version and LG G3 has Android 5.0 version, so it provides lots of additional features and increased performance.
The LG G3 features a much better looking screen than Samsung Galaxy M21, because although it has a little bit smaller screen, it also counts with a little bit more brightness, a better resolution of 2560 x 1440 and a greater display density. The Galaxy M21 has a way bigger storage capacity to install applications and games than LG G3, because it has more internal memory and an external memory slot that allows a maximum of 512 GB.
LG G3 has a bit more powerful CPU than Galaxy M21, because although it has a smaller amount of RAM and 4 lesser CPU cores , it also counts with a graphics co-processor. Galaxy M21 features a way better camera than LG G3, and although they both have the same 30 fps video frame rate and the same video resolution, the Galaxy M21 also has a much more mega-pixels back camera, a way larger back-facing camera sensor providing a much better image quality and a bigger aperture.
Samsung Galaxy M21 features a much longer battery lifetime than LG G3, because it has a 100% larger battery capacity.
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