Samsung Galaxy M21 vs Galaxy A51Here we compared two mid-range smartphones: the 6.4-inch Samsung Galaxy M21 (with Exynos 7 Octa 9611) that was released on March 17, 2020, against the Samsung Galaxy A51, which is powered by Exynos 9 Octa 9611 and came out 3 months before. On this page, you will find tests, full specs, strengths, and weaknesses of each of the gadgets. - Differences
- Review
- Specs
- Benchmarks
- Battery life
- Camera
- Comments
Key differencesAn overview of the main advantages of each smartphoneReasons to consider the Samsung Galaxy M21 - Comes with 2000 mAh larger battery capacity: 6000 vs 4000 mAh
- Faster storage type - UFS 2.1 versus UFS 2.0
Reasons to consider the Samsung Galaxy A51 - Slow-motion recording at 960FPS
- Weighs 16 grams less
- The front-facing camera can record video at 4K
We may receive a commission from Amazon for purchases made using the links below, but this has no bearing on our assessment methodology. 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 You can enter your local price of these phones (in USD or any other currency) and click on the "Calculate" button to see which one has a better value for money. Calculate Tests and specificationsComparison table of technical specifications and testsPhone: Galaxy M21 vs Galaxy A51 | Type | Super AMOLED | Super AMOLED | | Size | 6.4 inches | 6.5 inches | | Resolution | 1080 x 2340 pixels | 1080 x 2400 pixels | | Aspect ratio | 19.5:9 | 20:9 | | PPI | 403 ppi | 405 ppi | | Refresh rate | 60 Hz | 60 Hz | | HDR support | No | No | | Screen protection | Corning Gorilla Glass 3 | Corning Gorilla Glass 3 | | Screen-to-body ratio | 84.2% | 87.4% | | Display features | - Always-On Display | - Always-On Display |
Display tests | RGB color space | 141.3% | 98.8% | | PWM | 215 Hz | 242 Hz | | Response time | 9 ms | 25 ms | | Contrast | Infinity | Infinity |
Sources: NotebookCheck [3], [4] | Height | 159 mm (6.26 inches) | 158.5 mm (6.24 inches) | | Width | 75.1 mm (2.96 inches) | 73.6 mm (2.9 inches) | | Thickness | 8.9 mm (0.35 inches) | 7.9 mm (0.31 inches) | | Weight | 188 gramm (6.63 oz) | 172 gramm (6.07 oz) | | Waterproof | No | No | | Rear material | Plastic | Plastic | | Frame material | Plastic | Plastic | | Colors | Black, Blue, Green | White, Black | | Fingerprint scanner | Yes, rear | Yes, in-display |
Tests of Samsung Galaxy M21 and Samsung Galaxy A51 in the benchmarks SoC | Chipset | Samsung Exynos 7 Octa 9611 | Samsung Exynos 9 Octa 9611 | | Max. clock | 2300 MHz | 2300 MHz | | CPU cores | 8 (4 + 4) | 8 (4 + 4) | | Architecture | - 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73 | - 4 cores at 1.7 GHz: Cortex-A53
- 4 cores at 2.3 GHz: Cortex-A73 | | Lithography process | 10 nanometers | 10 nanometers | | Graphics | Mali-G72 MP3 | Mali-G72 MP3 | | GPU clock | 850 MHz | 850 MHz | | FLOPS | ~259 GFLOPS | ~259 GFLOPS |
Memory | RAM size | 4 GB | 4, 6 GB | | Memory type | LPDDR4X | LPDDR4X | | Memory clock | 1866 MHz | 1866 MHz | | Channels | 2 | 2 |
Storage | Storage size | 64 GB | 64, 128 GB | | Storage type | UFS 2.1 | UFS 2.0 | | Memory card | MicroSD | MicroSD | | Memory card max. size | Up to 512 GB | Up to 512 GB |
BenchmarksGeekbench 5 (Single-Core) | CPU | 60417 | 63753 | | GPU | 25363 | 43839 | | Memory | 44800 | 43507 | | UX | 66750 | 62692 | | Total score | 197132 | 212852 |
3DMark Wild Life Performance | Stability | 73% | 95% | | Graphics test | 4 FPS | 4 FPS | | Graphics score | 816 | 812 |
Sources: 3DMark [3], [4] ️ Submit your AnTuTu result | Operating system | Android 10.0 (Can be upgraded to Android 11.0) | Android 10 (Can be upgraded to Android 11) | | ROM | One UI 3.1 Core | One UI 3.0 | | OS size | 14.5 GB | 23 GB |
Specifications | Capacity | 6000 mAh | 4000 mAh | | Charge power | 15 W | 15 W | | Battery type | Li-Ion | Li-Po | | Replaceable | No | No | | Wireless charging | No | No | | Reverse charging | No | No | | Fast charging | Yes, Samsung Adaptive Fast Charge (25% in 30 min) | Yes (40% in 35 min) | | Full charging time | 2:35 hr | 1:50 hr |
Battery life testsCameraSpecs and camera test of smartphonesMain 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 30FPS | Up to 30FPS | | Slow motion | 240 FPS (720p) | 960 FPS (720p) | | Angle of widest lens | 123° | 120° | | Lenses | 3 (48 MP + 8 MP + 5 MP) | 4 (48 MP + 12 MP + 5 MP + 5 MP) | | Wide (main) lens | - 48 MP
- Aperture: f/2.0
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2.0", Samsung S5KGM2 (ISOCELL CMOS)
- Phase autofocus
| - 48 MP
- Aperture: f/2.0
- Focal length: 26 mm
- Pixel size: 0.8 micron
- Sensor: 1/2", Samsung S5KGM2 (ISOCELL CMOS)
- Phase autofocus
| | Ultra-wide lens | - 8 MP
- Aperture: f/2.2
- Focal length: 12 mm
- Pixel size: 1.12 micron
- Sensor: 1/4.0" (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 | - 5 MP
- Aperture: f/2.2
- Focal length: 25 mm
- Pixel size: 1.12 micron
- Sensor: 1/5.0" (CMOS)
| - 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 |
Selfie camera | Megapixels | 20 megapixels | 32 megapixels | | Image resolution | 5184 x 3888 | 6560 x 4928 | | Aperture | f/2.0 | f/2.2 | | Focal length | 26 mm | 26 mm | | Pixel size | - | 0.8 microns | | Sensor type | CMOS | ISOCELL CMOS | | Sensor size | - | 1/2.8" | | Video resolution | 1080p (Full HD) at 30 FPS | 2160p (4K) at 30 FPS |
| Wi-Fi standard | Wi-Fi 5 (802.11 a/b/g/n/ac) | Wi-Fi 5 (802.11 b/g/n/ac) | | Wi-Fi features | - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot | - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display | | Bluetooth version | 5 | 5 | | Bluetooth features | PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, 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
- OTG | - Charging
- USB-Storage mode
- OTG | | GPS | GPS, GLONASS, Beidou, Galileo | GPS, GLONASS, Beidou, Galileo | | NFC* | Yes | Yes | | Infrared port | No | No |
Network | Number of SIM* | 2 | 2 | | Type of SIM card | Nano | Nano | | Multi SIM mode | Standby | Standby | | eSIM support* | No | No | | Hybrid slot | No | No | | LTE Cat* | 12 | 12 | | 5G support | No | No |
| Speakers | Mono | Mono | | Headphone audio jack | Yes | Yes | | FM radio | Yes | Yes | | Dolby Atmos | Yes | Yes |
| Category | Mid-range | Mid-range | | Announced | March 2020 | December 2019 | | Release date | March 2020 | December 2019 | | SAR (head) | 0.492 W/kg | 0.596 W/kg | | SAR (body) | 1.13 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. If the battery life is more important to you, then choose the Samsung Galaxy M21. But if the camera and design are more of a priority go for the Samsung Galaxy A51. Cast your voteSo, which phone would you choose? Samsung Galaxy M21 614 (74.4%) Samsung Galaxy A51 211 (25.6%) Vote Total votes: 825 1. Samsung Galaxy M21 vs Samsung Galaxy A50 2. Samsung Galaxy M21 vs Xiaomi Mi 9 Lite 3. Samsung Galaxy M21 vs Samsung Galaxy A31 4. Samsung Galaxy M21 vs Samsung Galaxy M31 5. Samsung Galaxy M21 vs Samsung Galaxy A41 6. Samsung Galaxy A51 vs Samsung Galaxy A50 7. Samsung Galaxy A51 vs Xiaomi Mi A3 8. Samsung Galaxy A51 vs Samsung Galaxy A31 9. Samsung Galaxy A51 vs Huawei Honor 20 10. Samsung Galaxy A51 vs Huawei Honor 9X |
