Compare phones
| Global Score | |
| 85.2 | 84.1 |
| Basic Information | |
| Samsung | Samsung |
| -- | Android 11, 10 |
| 2018-11-15 | 2020-03-23 |
| 6.40 x 3.03 x 0.31 inches | 6.26 x 2.96 x 0.35 inches |
| 6.46 ounces | 6.63 ounces |
| Bubblegum pink, Caviar black and Lemonade blue | Midnight blue and Raven black |
| Glass and Metal | Plastic and Plastic |
| -- | Scratch-Resistant Glass |
| Display / Screen | |
| 6.3 inches | 6.4 inches |
| 2220 x 1080 pixels | 2340 x 1080 pixels |
| Super AMOLED | Super AMOLED |
| 392 pixels per inch | 403 pixels per inch |
| -- | 420 cd/m2 brightness |
| No touch screen | No touch screen |
| 8 | 8.4 |
| Performance | |
| Qualcomm Snapdragon 660 SDM660 chipset | Exynos 9611 chipset |
| Kryo 260, 64-bit, 14 nm (Octa-Core 2200 MHz) processor | Arm Cortex-A73 and Arm Cortex-A53, 64-bit, 10 nm (Octa-Core 2300 MHz) processor |
| 6 GB RAM | 4 GB RAM |
| Adreno 512 GPU | Mali-G72 MP3 GPU |
| 9.27 | 9.27 |
| Storage | |
| 128 GB internal memory | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 14.14 | 11.74 |
| Camera | |
| 24.00 MP + 24.00 MP | 48.00 MP + 20.00 MP |
| f/1.70 aperture | f/2.00 aperture |
| 27.00mm focal length | 26.00mm focal length |
| 0.36 inches (1/2.8") 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 (240 fps) (Full HD) slow motion video |
| 10.45 | 11.55 |
| 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 | |
| 3800mAh Li - Polymer Battery | 6000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.76 | 7.52 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| NFC | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Gyroscope and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Samsung Galaxy A9 (2018) is a little bit better than the Samsung Galaxy M21, with an 85.2 score against 84.1. Despite of the fact that the Samsung Galaxy A9 (2018) is older than the Samsung Galaxy M21, it's design is just a little bit lighter and thinner. Galaxy M21 features a processor that's just as good as the processing unit in Samsung Galaxy A9 (2018), and although the Galaxy M21 has less RAM, they both have a Octa-Core processing unit.
Galaxy M21 features a slightly better looking display than Samsung Galaxy A9 (2018), because it has a slightly better resolution of 1080 x 2340, a bit larger display and a just a little greater pixels density. The Samsung Galaxy A9 (2018) features a much better storage capacity to store more apps and games than Samsung Galaxy M21, and although they both have a slot for external memory cards that allows up to 512 GB, the Samsung Galaxy A9 (2018) also has more internal memory capacity.
Samsung Galaxy M21 counts with a really longer battery duration than Galaxy A9 (2018), because it has a 6000mAh battery size. Galaxy M21 shoots much better photos and videos than Samsung Galaxy A9 (2018), because although it has a tinier aperture which is not nice for low light photos, and they both have the same video frame rates and the same 3840x2160 video definition, the Galaxy M21 also counts with a way more mega pixels back facing camera and a lot larger camera sensor taking lot better quality pictures.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.