| Global Score | |
| 84.1 | 81.6 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 5.0, 4.4 |
| 2020-03-23 | 2014-09-03 |
| 6.26 x 2.96 x 0.35 inches | 6.04 x 3.09 x 0.33 inches |
| 6.63 ounces | 6.21 ounces |
| Midnight blue and Raven black | Black, Gold, Pink and White |
| Plastic and Plastic | -- |
| Scratch-Resistant Glass | Scratch-Resistant Glass |
| -- | $ 269.00 |
| Display / Screen | |
| 6.4 inches | 5.7 inches |
| 2340 x 1080 pixels | 1440 x 2560 pixels (Quad HD / 2K) |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 515 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | Capacitive, Multi-touch |
| 8.4 | 9.5 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 805 APQ8084 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Krait 450 (Quad-Core 2700 MHz) processor |
| 4 GB RAM | 3 GB (825 MHz) RAM |
| Mali-G72 MP3 GPU | Adreno 420 (500 MHz) GPU |
| 9.27 | 9.54 |
| 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 | 16.00 MP + 3.70 MP |
| f/2.00 aperture | f/2.20 aperture |
| 26.00mm focal length | 31.00mm focal length |
| 0.5 inches (1/2") sensor | 0.38 inches (1/2.6") 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 | 1920 x 1080 (60 fps) (Full HD) slow motion video |
| 11.55 | 10.01 |
| 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, EDGE, GPRS and GSM |
| Nano SIM, Dual SIM | Micro SIM |
| 6.7 | 7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3220mAh Li-Ion Battery |
| Non-Removable Battery | Removable Battery |
| -- | 20 hours talk time |
| 7.52 | 5.2 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 4.1, EDR |
| GPS | GPS |
| -- | NFC |
| -- | Infra-red port |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Barometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | -- |
The Galaxy M21 has a global score of 84.1, which is slightly better than the Galaxy Note 4's 81.6 score. These phones use Android OS (operating system), but the Galaxy M21 has 11 version and Galaxy Note 4 has Android 5.0 version, so it gives you some extra features. Although Galaxy M21 is noticeably newer than the Galaxy Note 4, it is just a little heavier and just a little bit thicker.
The Samsung Galaxy Note 4 counts with a little faster CPU than Samsung Galaxy M21, because although it has less processing cores and a smaller amount of RAM memory, it also counts with a GPU. Samsung Galaxy Note 4 counts with a more vivid display than Galaxy M21, because although it has a bit smaller display, it also counts with a better 2560 x 1440 resolution and a higher number of pixels per inch in the screen.
The Galaxy M21 counts with much more memory to install games and applications than Samsung Galaxy Note 4, because it has 64 GB internal memory and an external memory slot that holds up to 512 GB. Galaxy M21 counts with a very superior battery duration than Samsung Galaxy Note 4, because it has an 86 percent more battery capacity.
Galaxy M21 captures better pictures and videos than Galaxy Note 4, and although they both have the same 3840x2160 (4K) video definition and the same 30 fps video frame rates, the Galaxy M21 also has a lot bigger back-facing camera sensor providing a much higher image quality, a lot more megapixels camera and a larger diafragm aperture to take better captures and video in low light environments.
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