Compare phones
| Global Score | |
| 84.1 | 82.1 |
| Basic Information | |
| Samsung | Samsung |
| Android 11, 10 | Android 9.0 Pie, 8.0 Oreo |
| 2020-03-23 | 2018-08-27 |
| 6.26 x 2.96 x 0.35 inches | 6.39 x 3.03 x 0.30 inches |
| 6.63 ounces | 6.74 ounces |
| Midnight blue and Raven black | Black and White |
| 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 | 64 GB internal memory |
| microSDXC (up to 512 GB) external memory slot | microSDXC (up to 400 GB) external memory slot |
| 11.74 | 11.34 |
| Camera | |
| 48.00 MP + 20.00 MP | 16.00 MP + 24.00 MP |
| f/2.00 aperture | f/1.70 aperture |
| 26.00mm focal length | 26.00mm 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 | 10.01 |
| 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 |
| 6.7 | 6.7 |
| Battery Life | |
| 6000mAh Li - Polymer Battery | 3700mAh Li - Ion Battery |
| Non-Removable Battery | Non-Removable Battery |
| 7.52 | 5.68 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Gyroscope and Proximity Sensor | Accelerometer, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
Galaxy M21 is a bit better than Galaxy A8 Star, getting an 84.1 score against 82.1. These phones include Android OS, but Galaxy M21 has 11 version and Galaxy A8 Star has Android 9.0 Pie. Galaxy M21's body is newer and just a bit lighter, but somewhat thicker than the Galaxy A8 Star. Galaxy A8 Star counts with a processor that's very similar to Galaxy M21's CPU, and although the Galaxy A8 Star has a greater amount of RAM, they both have the same number of cores.
Samsung Galaxy M21 counts with a slightly better display than Galaxy A8 Star, because it has a bit higher resolution of 1080 x 2340 pixels, a bit bigger display and a little bit better amount of pixels per display inch. Samsung Galaxy M21 has a better camera than Galaxy A8 Star, because although it has a tinier diafragm aperture, and they both have the same 3840x2160 (4K) video resolution and the same video frame rates, the Samsung Galaxy M21 also counts with a camera with way more mega pixels and a much bigger back-facing camera sensor providing a way better image quality.
Galaxy M21 counts with a slightly bigger memory to install games and applications than Samsung Galaxy A8 Star, and although they both have equal 64 GB internal storage, the Galaxy M21 also has a slot for an SD memory card that supports a maximum of 512 GB. The Galaxy M21 has a way better battery performance than Galaxy A8 Star, because it has 6000mAh of battery capacity instead of 3700mAh.
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