| Global Score | |
| 81.6 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 5.0, 4.4 | Android 11, 10 |
| 2014-09-03 | 2020-03-23 |
| 6.04 x 3.09 x 0.33 inches | 6.26 x 2.96 x 0.35 inches |
| 6.21 ounces | 6.63 ounces |
| Black, Gold, Pink and White | Midnight blue and Raven black |
| -- | Plastic and Plastic |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| $ 269.00 | -- |
| Display / Screen | |
| 5.7 inches | 6.4 inches |
| 1440 x 2560 pixels (Quad HD / 2K) | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 515 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| Capacitive, Multi-touch | No touch screen |
| 9.5 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 805 APQ8084 chipset | Exynos 9611 chipset |
| Krait 450 (Quad-Core 2700 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 3 GB (825 MHz) RAM | 4 GB RAM |
| Adreno 420 (500 MHz) GPU | Mali-G72 MP3 GPU |
| 9.54 | 9.27 |
| Storage | |
| 32 GB internal memory | 64 GB internal memory |
| microSD, microSDHC, microSDXC (up to 128 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 8.12 | 11.74 |
| Camera | |
| 16.00 MP + 3.70 MP | 48.00 MP + 20.00 MP |
| f/2.20 aperture | f/2.00 aperture |
| 31.00mm focal length | 26.00mm focal length |
| 0.38 inches (1/2.6") sensor | 0.5 inches (1/2") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 3840 x 2160 (30 fps) (4K) video resolution |
| 1920 x 1080 (60 fps) (Full HD) slow motion video | 1920 x 1080 (240 fps) (Full HD) slow motion video |
| 10.01 | 11.55 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE (4G), HSPA+ (4G), HSDPA, HSUPA, EDGE, GPRS and GSM | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Micro SIM | Nano SIM, Dual SIM |
| 7 | 6.7 |
| Battery Life | |
| 3220mAh Li-Ion Battery | 6000mAh Li - Polymer Battery |
| Removable Battery | Non-Removable Battery |
| 20 hours talk time | -- |
| 5.2 | 7.52 |
| Other Features | |
| Bluetooth 4.1, EDR | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| -- | FM Radio |
The Galaxy M21 has a general score of 84.1, which is a little bit better than the Samsung Galaxy Note 4's general score of 81.6. Galaxy M21's construction is noticeably newer, but a little heavier and just a little thicker than the Samsung Galaxy Note 4. These phones work with Android OS (operating system), but Galaxy M21 has newer 11 version and Samsung Galaxy Note 4 has Android 5.0 version.
The Galaxy Note 4 counts with a brighter screen than Samsung Galaxy M21, because although it has a little smaller display, it also counts with a higher pixel density and a higher 2560 x 1440 resolution. Galaxy Note 4 has a little better performance than Samsung Galaxy M21, because although it has lesser RAM and a lower number of cores (although faster), it also counts with an extra graphics co-processor.
Galaxy M21 counts with a much bigger storage capacity for games and applications than Samsung Galaxy Note 4, because it has 64 GB internal memory and an external SD slot that supports a maximum of 512 GB. Galaxy M21 counts with a much longer battery lifetime than Galaxy Note 4, because it has a 6000mAh battery capacity instead of 3220mAh.
Samsung Galaxy M21 counts with a much better camera than Samsung Galaxy Note 4, and although they both have the same 3840x2160 video definition and the same video frame rates, the Samsung Galaxy M21 also has a back-facing camera with much more mega-pixels, a bigger diafragm aperture to take better photography in poorly lited situations and a way bigger camera sensor capturing more light and vivid colors.
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