Xiaomi Mi A3 vs Samsung Galaxy A51
Here we compared two mid-range smartphones: the 6.01-inch Xiaomi Mi A3 (with Qualcomm Snapdragon 665) that was released on July 4, 2019, against the Samsung Galaxy A51, which is powered by Exynos 9 Octa 9611 and came out 6 months after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets.
Key differences
Reasons to consider the Xiaomi Mi A3
- Shows 20% longer battery life (31:56 vs 26:33 hours)
- Has a built-in infrared port
Reasons to consider the Samsung Galaxy A51
- Delivers 75% higher peak brightness (630 against 360 nits)
- 44% higher pixel density (405 vs 282 PPI)
- Has a 0.49 inch larger screen size
- More recent OS version: Android 13 versus 11
- Slow-motion recording at 960FPS
- Supports Dolby Atmos sound technology
- 17% faster in single-core GeekBench 5 test: 349 and 299 points
- The phone is 6-months newer
- The front-facing camera can record video at 4K
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Review
Display
Screen quality, color accuracy, brightness
Performance
CPU/GPU performance in apps and games
Battery
Battery life, charging type and speed
Camera
Photo and video recording quality
Connectivity
Networks, ports, data transmission
NanoReview score
Final comparison evaluation
Value for money
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Tests and specifications
Comparison table of technical specifications and testsDisplay
| Type | Super AMOLED | Super AMOLED |
| Size | 6.01 inches | 6.5 inches |
| Resolution | 720 x 1560 pixels | 1080 x 2400 pixels |
| Aspect ratio | 19.5:9 | 20:9 |
| PPI | 282 ppi | 405 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Max rated brightness | 350 nits | 400 nits |
| HDR support | No | No |
| Screen protection | Corning Gorilla Glass 5 | Corning Gorilla Glass 3 |
| Screen-to-body ratio | 82.77% | 87.4% |
| Display features | - Always-On Display - DC Dimming |
- Always-On Display |
| RGB color space | - | 98.8% |
| PWM | - | 242 Hz |
| Response time | - | 25 ms |
| Contrast | - | ∞ Infinity |
Peak brightness test (auto)
Design and build
| Height | 153.5 mm (6.04 inches) | 158.5 mm (6.24 inches) |
| Width | 71.9 mm (2.83 inches) | 73.6 mm (2.9 inches) |
| Thickness | 8.5 mm (0.33 inches) | 7.9 mm (0.31 inches) |
| Weight | 173 g (6.1 oz) | 172 g (6.07 oz) |
| Waterproof | No | No |
| Rear material | Glass | Plastic |
| Frame material | Plastic | Plastic |
| Colors | White, Gray, Blue | White, Black |
| Fingerprint scanner | Yes, in-display | Yes, in-display |
Screen-to-body ratio
Performance
| Chipset | Qualcomm Snapdragon 665 | Samsung Exynos 9 Octa 9611 |
| Max. clock | 2000 MHz | 2300 MHz |
| CPU cores | 8 (4 + 4) | 8 (4 + 4) |
| Architecture | - 4 cores at 1.8 GHz: Kryo 260 Silver (Cortex-A53) - 4 cores at 2 GHz: Kryo 260 Gold (Cortex-A73) |
- 4 cores at 1.7 GHz: Cortex-A53 - 4 cores at 2.3 GHz: Cortex-A73 |
| Lithography process | 11 nanometers | 10 nanometers |
| Graphics | Adreno 610 | Mali-G72 MP3 |
| GPU clock | 950 MHz | 850 MHz |
| FLOPS | ~273 GFLOPS | ~259 GFLOPS |
Benchmarks
Geekbench 5 (Single-Core)
Geekbench 5 (Multi-Core)
AnTuTu Benchmark 9
| CPU | 64335 | 49711 |
| GPU | 39240 | 53719 |
| Memory | 43240 | 43824 |
| UX | 56622 | 70475 |
| Total score | 203221 | 217513 |
3DMark Wild Life Performance
| Stability | 98% | 95% |
| Graphics test | 2 FPS | 4 FPS |
| Graphics score | 378 | 812 |
| PCMark 3.0 score | 6482 | - |
Memory
| RAM size | 4, 6 GB | 4, 6 GB |
| Memory type | LPDDR4X | LPDDR4X |
| Memory clock | 1866 MHz | 1866 MHz |
| Channels | 2 | 2 |
| Storage size | 64, 128 GB | 64, 128 GB |
| Storage type | UFS 2.0 | UFS 2.0 |
| Memory card | MicroSD | MicroSD |
| Memory card max. size | Up to 256 GB | Up to 512 GB |
Software
| Operating system | Android 9.0 (Can be upgraded to Android 11) | Android 10 (Can be upgraded to Android 13) |
| ROM | Android One | One UI 5.0 |
| OS size | - | 23 GB |
Battery
| Capacity | 4030 mAh | 4000 mAh |
| Charge power | 18 W | 15 W |
| Battery type | Li-Po | Li-Po |
| Replaceable | No | No |
| Wireless charging | No | No |
| Reverse charging | No | No |
| Fast charging | Yes, Quick Charge 3.0 (45% in 30 min) | Yes (40% in 35 min) |
| Full charging time | 2:30 hr | 1:50 hr |
| Web browsing | 09:16 hr | 09:34 hr |
| Watching video | 17:26 hr | 11:29 hr |
| Gaming | 05:01 hr | 05:12 hr |
| Standby | 104 hr | 83 hr |
General battery life
Camera
| Matrix | 48 megapixels | 48 megapixels |
| Image resolution | 8000 x 6000 | 8000 x 6000 |
| Zoom | Digital | Digital |
| Flash | LED | LED |
| Stabilization | Digital | Digital |
| 8K video recording | No | No |
| 4K video recording | Up to 30FPS | Up to 30FPS |
| 1080p video recording | Up to 120FPS | Up to 30FPS |
| Slow motion | 480 FPS (720p) | 960 FPS (720p) |
| Angle of widest lens | 118° | 120° |
| Lenses | 3 (48 MP + 8 MP + 2 MP) | 4 (48 MP + 12 MP + 5 MP + 5 MP) |
| Wide (main) lens | - 48 MP - Aperture: f/1.8 - Pixel size: 0.8 micron - Sensor: 1/2", Sony IMX586 (CMOS) - Phase autofocus |
- 48 MP - Aperture: f/2.0 - Focal length: 26 mm - Pixel size: 0.8 micron - Sensor: 1/2", Sony IMX582 (Exmor-RS CMOS) - Phase autofocus |
| Ultra-wide lens | - 8 MP - Aperture: f/2.2 - Focal length: 13 mm - Pixel size: 1.12 micron - Sensor: 1/4" (CMOS) |
- 12 MP - Aperture: f/2.2 - Focal length: 13 mm - Pixel size: 1.12 micron |
| Macro lens | - | - 5 MP - Aperture: f/2.4 - Focal length: 40 mm - Pixel size: 1.12 micron |
| Depth lens | - 2 MP - Aperture: f/2.4 |
- 5 MP - Aperture: f/2.2 - Pixel size: 1.12 micron - Sensor: 1/5.0" (CMOS) |
| Camera features | - Bokeh mode - Pro mode |
- Bokeh mode - Pro mode |
| Megapixels | 32 megapixels | 32 megapixels |
| Image resolution | 6816 x 4735 | 6560 x 4928 |
| Aperture | f/2.0 | f/2.2 |
| Focal length | - | 26 mm |
| Pixel size | 0.8 microns | 0.8 microns |
| Sensor type | ISOCELL CMOS | ISOCELL CMOS |
| Sensor size | 1/2.8" | 1/2.8" |
| Video resolution | 1080p (Full HD) at 30 FPS | 2160p (4K) at 30 FPS |
Connectivity
| Wi-Fi standard | Wi-Fi 5 (802.11 b/g/n/ac) | Wi-Fi 5 (802.11 b/g/n/ac) |
| Wi-Fi features | - Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
- Dual Band - Wi-Fi Direct - Wi-Fi Hotspot - Wi-Fi Display |
| Bluetooth version | 5 | 5 |
| Bluetooth features | LE, HID, A2DP | PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP |
| USB type | USB Type-C | USB Type-C |
| USB version | 2 | 2 |
| USB features | - Charging - USB-Storage mode - USB-Host mode - OTG |
- Charging - USB-Storage mode - OTG |
| GPS | GPS, GLONASS, Beidou, Galileo | GPS, GLONASS, Beidou, Galileo |
| NFC* | No | Yes |
| Infrared port | Yes | No |
| Number of SIM* | 2 | 2 |
| Type of SIM card | Nano | Nano |
| Multi SIM mode | Standby | Standby |
| eSIM support* | No | No |
| Hybrid slot | Yes | No |
| LTE Cat* | 6 | 12 |
| 5G support | No | No |
Sound
| Speakers | Mono | Mono |
| Headphone audio jack | Yes | Yes |
| FM radio | Yes | Yes |
| Dolby Atmos | No | Yes |
Speakers test
Max. loudness
Other
| Category | Mid-range | Mid-range |
| Announced | July 2019 | December 2019 |
| Release date | August 2019 | December 2019 |
| SAR (head) | 0.3 W/kg | 0.596 W/kg |
| SAR (body) | 1.1 W/kg | 1.45 W/kg |
| Sensors | - Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
- Proximity sensor - Gyroscope - Accelerometer - Ambient light sensor - Compass - Fingerprint |
*Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Conclusion
After analyzing all the data, we think that the Samsung Galaxy A51 is definitely a better buy.
Cast your vote
Total votes: 179