Samsung Galaxy S21 vs Samsung Galaxy A51 5G
65
out 100
VS
45
out 100
Compared 2 smartphones : Samsung Galaxy S21 Manufactured in February, 2021, with display 6.2 with chipsetSamsung Exynos 2100, vs Samsung Galaxy A51 5G, Manufactured in June, 2020 with chipsetSamsung Exynos 980. Below are specs, tests, pros and cons for each device
Key Differences
Reasons to choose Samsung Galaxy S21
- Higher pixel density: 421ppi
- Higher refresh rate: 120Hz
- Lighter design: 169g vs 187g
- Supports newer USB: 3.2 vs 2
- Built-in eSIM
Reasons to choose Samsung Galaxy A51 5G
- Larger display: 6.5in
- Higher battery capacity: 4500mAh vs 4000mAh
Versions
| Memory Options | - 8/128 GB - 8/256 GB |
- 6/128 GB - 8/128 GB |
Review
Display
Color accuracy, sharpness & brightness
Camera
Main & front camera tests
Performance
App & system performance
Games
3D gaming performance
Battery
Battery life, charging speed & type
Connectivity
Connectivity features
Adjust each parameter’s importance to find the best match for you.
Tests & specs
Specs & test comparisonDisplay
| Type | Dynamic AMOLED | Super AMOLED |
| Size | 6.2 in | 6.5 in |
| Resolution | 1080x2400 pixels | 1080x2400 pixels |
| Aspect ratio | 20:9 | 20:9 |
| Pixel density | 421 ppi | 405 ppi |
| Refresh rate | 120 Hz | 60 Hz |
| Adaptive refresh rate | Yes (48-120 Hz) | No |
| Max brightness | 800 nits | 400 nits |
| HDR support | Yes HDR10+ | No |
| Screen-to-body ratio | 85.9 % | 87.3 % |
| Features | - DCI-P3 - Always-On Display |
Always-On Display |
| sRGB gamut | 99.5 % | n/a |
| PWM (Flicker) | 240 Hz | n/a |
| Response time | 5 ms | n/a |
| Contrast | ∞ Infinite | n/a |
Design & Build
| Height | 151.7 mm (5.97 in) | 158.9 mm (6.26 in) |
| Width | 71.2 mm (2.8 in) | 73.6 mm (2.9 in) |
| Thickness | 7.9 mm (0.31 in) | 8.7 mm (0.34 in) |
| Weight | 169 g (5.96 oz) | 187 g (6.6 oz) |
| Water resistance | IP68 | No |
| Back panel | Plastic | Plastic |
| Frame | Metal | Metal |
| Colors | - White - Gray - Pink - Purple |
- White - Black - Pink |
| Fingerprint sensor | Yes In-Display | Yes In-Display |
Screen-to-body ratio
Performance
| Chipset | Samsung Exynos 2100 | Samsung Exynos 980 |
| Max Frequency | 2900 MHz | 2200 MHz |
| CPU Cores | 8 (1 + 3 + 4) | 8 (2 + 6) |
| Architecture | - 4/2.2 (Cortex-A55) - 3/2.81 (Cortex-A78) - 1/2.91 (Cortex-X1) |
- 6/1.8 (Cortex-A55) - 2/2.2 (Cortex-A77) |
| Process | Samsung | Samsung |
| Transistor Size | 5 nm | 8 nm |
| Neural Processor | Yes | Yes |
| Graphics | Mali-G78 MP14 | Mali-G76 MP5 |
| GPU Cores | 896 | 180 |
| GPU Frequency | 854 MHz | 700 MHz |
| FLOPS | 1530.4 GFLOPS | 262.1 GFLOPS |
| Geekbench 6 (Single-Core) | 1331 | 863 |
| Geekbench 6 (Multi-Core) | 3593 | 2112 |
| CPU | 253391 | 130998 |
| GPU | 281676 | 85094 |
| Memory | 158352 | 86339 |
| UX | 210361 | 104345 |
| NanoReview Score | 903780 | 406776 |
| Max Surface Temp. | 38.9 °C | n/a |
| Stability | 66 % | n/a |
| Graphics Test | 34 fps | n/a |
| Graphics Score | 5715 | n/a |
| Writing score | 16101 | n/a |
| Web score | 11909 | n/a |
| Video editing | 7097 | n/a |
| Data manipulation | 10153 | n/a |
| NanoReview Score | 13123 | n/a |
Memory
| RAM Size | 8 GB | 6 GB |
| Memory Type | LPDDR5 | LPDDR4X |
| Memory Frequency | 2750 MHz | 1866 MHz |
| Channels | 2 | 2 |
| Storage Capacity | - 128 GB - 256 GB | 128 GB |
| Storage Type | UFS 3.1 | UFS 2.0 |
| Memory Card | No | MicroSD |
Software
| OS | Android 11 (Upgradeable to Android 14) | Android 10 (Upgradeable to Android 13) |
| OS Size | 28.1 GB | 22.7 GB |
| UI Skin | One UI 6.0 | One UI 5.0 |
Battery
| Volume | 4000 mAh | 4500 mAh |
| Max Charging Power | 25 W | 15 W |
| Battery Type | Li-ion | Li-Po |
| Removable | No | No |
| Wireless Charging | Yes (15 W) | No |
| Reverse Charging | Yes (Wireless) | No |
| Fast Charging | Yes (55% in 50 min) | Yes (40% in 40 min) |
| Full Charge Time | 1:35 h | 2:05 h |
| Web Browsing | 06:01 h | 07:25 h |
| Video Playback | 11:06 h | 12:09 h |
| Games | 04:21 h | 05:11 h |
| Standby Mode | 95 h | 81 h |
Main camera
| Matrix | 12 MP | 48 MP |
| Photo resolution | 4000x3000 pixels | 8000x6000 pixels |
| Zoom | Optical, 1.1x | Digital |
| Flash | Dual LED | LED |
| Stabilization | Optical | Digital |
| 8K Recording | Up to 24FPS | No |
| 4K Recording | Yes (Up to 60 fps) | Yes (Up to 30 fps) |
| 1080p Recording | Yes (Up to 60 fps) | Yes (Up to 120 fps) |
| Slow Motion | 960 fps (720p) | 960 fps (720p) |
| Wide-angle lens | 120 ° | 123 ° |
| Lenses count | Standard: 12 MP Telephoto: 64 MP Ultra-wide: 12 MP |
Standard: 48 MP Ultra-wide: 12 MP Macro: 5 MP Depth: 5 MP |
| Features | - Bokeh effect - Pro mode - RAW support |
- Bokeh effect - Pro mode |
| Matrix | 12 MP | 48 MP |
| Aperture | f/1.8 | f/2.0 |
| Focal length | 26 mm | 26 mm |
| Sensor | Sony IMX555 | Samsung S5KGM2 |
| Sensor size | 1/1.76 | 1/2 |
| Pixel size | 1.8 μm | 0.8 μm |
| Autofocus | Phase autofocus (Dual Pixel) | Phase autofocus |
| Stabilization | Optical | Digital |
| Matrix | 64 MP | n/a |
| Aperture | f/2.0 | n/a |
| Focal length | 28 mm | n/a |
| Sensor | Samsung Bright S5KGW2 | n/a |
| Sensor size | 1/1.72 | n/a |
| Pixel size | 0.8 μm | n/a |
| Stabilization | Optical | n/a |
| Matrix | 12 MP | 12 MP |
| Aperture | f/2.2 | f/2.2 |
| Focal length | 13 mm | 13 mm |
| Sensor | Sony IMX563 | n/a |
| Sensor size | 1/2.55 | n/a |
| Pixel size | 1.4 μm | 1.12 μm |
| Stabilization | Digital | Digital |
| Bokeh | 70 | n/a |
| Preview | 72 | n/a |
| Zoom | 126 | n/a |
Front camera
| Matrix | 10 MP | 32 MP |
| Photo resolution | 3872x2592 pixels | 6560x4928 pixels |
| Aperture | f/2.2 | f/2.2 |
| Focal length | 26 mm | 26 mm |
| Sensor | Sony IMX374 | Samsung S5KGD1 |
| Sensor size | 1/3.24 | 1/2.8 |
| Pixel size | 1.22 μm | 0.8 μm |
| Autofocus | Phase autofocus (Dual Pixel) | No |
| Stabilization | Digital | Digital |
| Video resolution | 2160p (4K) at 60 fps | 2160p (4K) at 30 fps |
| TOF 3D sensor | No | No |
Connectivity
| Wi-Fi version | Wi-Fi 6 (802.11 a/b/g/n/ac/ax) | Wi-Fi 5 (802.11 a/b/g/n/ac) |
| Wi-Fi features | - Dual Band - Wi-Fi MiMO - 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, A2DP | PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP |
| USB type | USB Type-C | USB Type-C |
| USB version | 3.2 | 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* | Yes | Yes |
| Infrared Port | No | No |
| SIM Count* | 2 | 2 |
| SIM Type | Nano | Nano |
| SIM Mode | Dual SIM Standby | Dual SIM Standby |
| eSIM Support * | Yes | No |
| Hybrid Slot | No | No |
| 2G Bands | GSM 850, 900, 1800, 1900 MHz | GSM 850 / 900 / 1800 / 2100 / 2600 |
| 3G Bands | WCDMA Band 1, 2, 4, 5, 8 | UMTS 850 / 900 / 1900 / 2100 |
| LTE Bands* | LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B32/B38/B39/B40/B41/B66) | LTE (B850/B900/B1800/B2100/B2600) |
| LTE category | 24 | 12 |
| 5G Support | Yes | Yes |
Sound
| Speakers | Stereo | Mono |
| 3.5 mm Jack | No | Yes |
| FM Radio | No | Yes |
| Dolby Atmos | Yes | Yes |
Other
| Class | Flagship | Mid-range |
| Announced | January, 2021 yr | April, 2020 yr |
| Release Date | February, 2021 yr | June, 2020 yr |
| Launch Price ($) | 800 | 499 |
| Sensors | - Hall Sensor - Barometer - Proximity Sensor - Gyroscope - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor |
- Proximity Sensor - Gyroscope - Accelerometer - Ambient Light Sensor - Compass - Fingerprint sensor |
*
Attention!
Config, frequencies, NFC, and other specs may vary by region.
Results
After analyzing the data, we consider Samsung Galaxy S21 the clear winner in this comparison.
Survey
Total Votes: 0
