Compare phones
| Global Score | |
| 79.2 | 76.1 |
| Basic Information | |
| Xiaomi | Samsung |
| Android 11, 10, 9.0 Pie | Android 10 |
| 2019-07-24 | 2020-06-29 |
| 6.04 x 2.83 x 0.33 inches | 6.61 x 3.02 x 0.32 inches |
| 6.13 ounces | 6.81 ounces |
| Blue, Gray and White | Black |
| Glass (Corning Gorilla Glass 5) and Plastic | Plastic and Plastic |
| Scratch-Resistant Glass | -- |
| -- | $ 194.00 |
| Display / Screen | |
| 6.1 inches | 6.5 inches |
| 1560 x 720 pixels | 1600 x 720 pixels |
| Super AMOLED | IPS LCD |
| 282 pixels per inch | 270 pixels per inch |
| No touch screen | No touch screen |
| 7.3 | 7.3 |
| Performance | |
| Qualcomm Snapdragon 665 chipset | Mediatek Helio P35 chipset |
| Kryo 260, 64-bit, 11 nm (Octa-Core 2000 MHz) processor | Arm Cortex-A53, 64-bit, 12 nm (Octa-Core 2300 MHz) processor |
| 4 GB RAM | 3 GB RAM |
| Adreno 610 GPU | PowerVR GE8320 GPU |
| 9.09 | 9.27 |
| Storage | |
| 128 GB internal memory | 32 GB internal memory |
| microSDXC (up to 256 GB) external memory slot | microSDXC (up to 512 GB) external memory slot |
| 13.18 | 9.84 |
| Camera | |
| 48.00 MP + 32.00 MP | 16.00 MP + 13.00 MP |
| f/1.80 aperture | f/1.80 aperture |
| 0.43 inches (1/2.3") sensor | 0.33 inches (1/3.06") sensor |
| 3840 x 2160 (30 fps) (4K) video resolution | 1920 x 1080 (30 fps) (Full HD) video resolution |
| 1280 x 720 (240 fps) (HD) slow motion video | -- |
| 11.44 | 9.35 |
| 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 | Nano SIM |
| 6.7 | 6.7 |
| Battery Life | |
| 4030mAh Battery | 4000mAh Li - Polymer Battery |
| Non-Removable Battery | Non-Removable Battery |
| 5.92 | 5.92 |
| Other Features | |
| Bluetooth 5.0 | Bluetooth 5.0 |
| GPS | GPS |
| -- | NFC |
| Infra-red port | -- |
| Fingerprint ID Scanner | Fingerprint ID Scanner |
| Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor | Accelerometer, Compass, Gyroscope, Light Sensor and Proximity Sensor |
| FM Radio | FM Radio |
Comparison review
The Xiaomi Mi A3 is a bit better than Samsung Galaxy A21, getting a 79.2 score against 76.1. Despite of the fact the Xiaomi Mi A3 is older and just a little bit thicker than the Samsung Galaxy A21, it's body is still just a bit lighter. These phones have Android operating system, but Xiaomi Mi A3 has 11 version and Samsung Galaxy A21 has Android 10.
Galaxy A21 features just a bit better processing power than Xiaomi Mi A3, although it has 1 GB less RAM memory, they both have 8 CPU cores. Galaxy A21 and Xiaomi Mi A3 count with incredibly similar displays, because although the Galaxy A21 has a just a bit lower pixel density, it also counts with a little bit bigger display and a slightly higher 720 x 1600 resolution.
Xiaomi Mi A3 counts with a way better camera than Samsung Galaxy A21, and although they both have the same diafragm aperture, the Xiaomi Mi A3 also has a way higher 3840x2160 (4K) video quality, a lot bigger sensor taking lot higher quality photos and videos and a much higher resolution back-facing camera.
The Xiaomi Mi A3 features a very superior memory to install games and applications than Galaxy A21, because although it has a slot for an external memory card that admits a maximum of 256 GB against 512 GB, it also counts with 96 GB more internal memory. The Galaxy A21 has a battery lifetime that is very similar to Xiaomi Mi A3's battery life, although the Galaxy A21 has just 4000mAh battery size instead of 4030mAh.
Disclaimer: As an Amazon Associate I earn from qualifying purchases.