Compare phones
| Global Score | |
| 84.1 | 85.2 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | -- |
| 2020-03-23 | 2018-11-15 |
| 6.26 x 2.96 x 0.35 inches | 6.40 x 3.03 x 0.31 inches |
| 6.63 ounces | 6.46 ounces |
| Midnight blue and Raven black | Bubblegum pink, Caviar black and Lemonade blue |
| Plastic and Plastic | Glass and Metal |
| Scratch-Resistant Glass | -- |
| Display / Screen | |
| 6.4 inches | 6.3 inches |
| 2340 x 1080 pixels | 2220 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 403 pixels per inch | 392 pixels per inch |
| 420 cd/m2 brightness | -- |
| No touch screen | No touch screen |
| 8.4 | 8 |
| Performance | |
| Exynos 9611 chipset | Qualcomm Snapdragon 660 SDM660 chipset |
| Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor | Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor |
| 4 GB RAM | 6 GB RAM |
| Mali-G72 MP3 GPU | Adreno 512 GPU |
| 9.27 | 9.27 |
| Storage | |
| 64 GB internal memory | 128 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 11.74 | 14.14 |
| Camera | |
| 48.00 MP + 20.00 MP | 24.00 MP + 24.00 MP |
| f/2.00 aperture | f/1.70 aperture |
| 26.00mm focal length | 27.00mm focal length |
| 0.5 inches (1/2") sensor | 0.36 inches (1/2.8") 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 | 10.45 |
| Networks | |
| Wi-Fi | Wi-Fi |
| Mobile Hotspot | Mobile Hotspot |
| LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA | LTE-A (4G), LTE (4G), HSPA+ (4G), HSDPA and HSUPA |
| Nano SIM, Dual SIM | Nano SIM, Dual SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3800mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.76 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Samsung Galaxy A9 (2018) is slightly better than Galaxy M21, getting an 85.2 score against 84.1. Despite of the fact that the Samsung Galaxy A9 (2018) is older than the Galaxy M21, it's body is a bit lighter and somewhat thinner. Samsung Galaxy M21 and Galaxy A9 (2018) feature very similar processing units, and although the Galaxy A9 (2018) has a higher amount of RAM memory, they both have 8 processing cores.
Galaxy M21 has a little bit better looking screen than Galaxy A9 (2018), because it has a little bit more pixels per inch of screen, a slightly better resolution of 1080 x 2340px and a little bit bigger display. The Samsung Galaxy A9 (2018) features a much bigger storage capacity to install applications and games than Galaxy M21, and although they both have a SD memory slot that supports a maximum of 512 GB, the Samsung Galaxy A9 (2018) also has more internal storage capacity.
The Samsung Galaxy M21 counts with a very superior battery duration than Galaxy A9 (2018), because it has a 58% larger battery capacity. The Galaxy M21 counts with a superior camera than Galaxy A9 (2018), because although it has a smaller aperture which is not favorable for low-light captures and video, and they both have the same 3840x2160 (4K) video resolution and the same video frame rate, the Galaxy M21 also counts with a back camera with lot more mega-pixels and a lot bigger sensor capturing way better quality photographs.
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