Samsung Galaxy S9 Plus vs Galaxy A51
55
out of 100
VS
52
out of 100
Here we compared two smartphones: the 6.2-inch Samsung Galaxy S9 Plus (with Exynos 9 Octa 9810) that was released on February 25, 2018, against the Samsung Galaxy A51, which is powered by Exynos 9 Octa 9611 and came out 22 months after. On this page, you will find tests, full specs, strengths, and weaknesses of each of the devices.
Key differences
Reasons to consider the Samsung Galaxy S9 Plus
- Waterproof body (IP68 classification)
- 86% better performance in AnTuTu Benchmark (458K versus 246K)
- The rear camera has a 2x optical zoom
- 31% higher pixel density (531 vs 405 PPI)
- Handles Qi/PMA wireless charging up to 10W
- Optical image stabilization
- Stereo speakers
- Faster storage type - UFS 2.1 versus UFS 2.0
- 47% faster in single-core GeekBench 6 test: 754 and 513 points
Reasons to consider the Samsung Galaxy A51
- Shows 15% longer battery life (26:33 vs 23:09 hours)
- Has a 0.3 inch larger screen size
- More recent OS version: Android 13 versus 10
- Comes with 500 mAh larger battery capacity: 4000 vs 3500 mAh
- Has an ultra-wide angle camera lens
- The phone is 1-year and 10-months newer
- Weighs 17 grams less
- The front-facing camera can record video at 4K
Review
Display
Screen quality, color accuracy, brightness
Camera
Photo and video recording quality
Performance
CPU and memory performance (apps, system)
Gaming
Capabilities for playing modern games
Battery
Battery life, charging type and speed
Connectivity
Networks, ports, data transmission
Value for money
Tests and specifications
Comparison table of technical specifications and testsDisplay
| Type | Super AMOLED | Super AMOLED |
| Size | 6.2 inches | 6.5 inches |
| Resolution | 1440 x 2960 pixels | 1080 x 2400 pixels |
| Aspect ratio | 18.5:9 | 20:9 |
| PPI | 531 ppi | 405 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Adaptive refresh rate | No | No |
| Max rated brightness | 631 nits | 400 nits |
| HDR support | Yes, HDR10 | No |
| Screen protection | Corning Gorilla Glass 5 | Corning Gorilla Glass 3 |
| Screen-to-body ratio | 84.2% | 87.4% |
| Display features | - Always-On Display | - Always-On Display |
| RGB color space | - | 98.8% |
| PWM | 215 Hz | 242 Hz |
| Response time | 7 ms | 25 ms |
| Contrast | ∞ Infinity | ∞ Infinity |
Peak brightness test (auto)
Design and build
| Height | 158.1 mm (6.22 inches) | 158.5 mm (6.24 inches) |
| Width | 73.8 mm (2.91 inches) | 73.6 mm (2.9 inches) |
| Thickness | 8.5 mm (0.33 inches) | 7.9 mm (0.31 inches) |
| Weight | 189 g (6.67 oz) | 172 g (6.07 oz) |
| Waterproof | IP68 | No |
| Rear material | Glass | Plastic |
| Frame material | Metal | Plastic |
| Colors | Black, Gold, Gray, Red, Purple | White, Black |
| Fingerprint scanner | Yes, rear | Yes, in-display |
Screen-to-body ratio
Performance
| Chipset | Samsung Exynos 9 Octa 9810 | Samsung Exynos 9 Octa 9611 |
| Max clock | 2700 MHz | 2300 MHz |
| CPU cores | 8 (4 + 4) | 8 (4 + 4) |
| Architecture |
- 4 cores at 1.9 GHz: Cortex-A55
- 4 cores at 2.9 GHz: Exynos M3 |
- 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 MP18 | Mali-G72 MP3 |
| GPU shading units | 324 | 54 |
| GPU clock | 572 MHz | 850 MHz |
| FLOPS | ~370.6 GFLOPS | ~91.8 GFLOPS |
Benchmarks
Geekbench 6 (Single-Core)
Geekbench 6 (Multi-Core)
AnTuTu Benchmark 10
| CPU | 142354 | 69792 |
| GPU | 106454 | 55670 |
| Memory | 92729 | 60677 |
| UX | 113153 | 59872 |
| Total score | 458699 | 246594 |
3DMark Wild Life Performance
| Max surface temperature | 40.7 °C | 42.2 °C |
| Stability | 95% | 95% |
| Graphics test | 13 FPS | 4 FPS |
| Graphics score | 2328 | 812 |
PCMark 3.0
| Web score | 5002 | - |
| Video editing | 5467 | - |
| Photo editing | 9176 | - |
| Data manipulation | 5634 | - |
| Writing score | 5961 | - |
Memory
| RAM size | 6 GB | 4, 6 GB |
| Memory type | LPDDR4X | LPDDR4X |
| Memory clock | 1794 MHz | 1866 MHz |
| Channels | 2 | 2 |
| 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 400 GB | Up to 512 GB |
Software
| Operating system | Android 8.0 (Can be upgraded to Android 10) | Android 10 (Can be upgraded to Android 13) |
| ROM | One UI 2.1 | One UI 5.0 |
| OS size | 13.9 GB | 23 GB |
Battery
| Capacity | 3500 mAh | 4000 mAh |
| Max charge power | 15 W | 15 W |
| Battery type | Li-Po | Li-Po |
| Replaceable | No | No |
| Wireless charging | Yes, Qi/PMA (10 W) | No |
| Reverse charging | No | No |
| Fast charging | Yes (40% in 30 min) | Yes (40% in 35 min) |
| Full charging time | 1:40 hr | 1:50 hr |
| Web browsing | 06:50 hr | 09:34 hr |
| Watching video | 11:56 hr | 11:29 hr |
| Gaming | 03:31 hr | 05:12 hr |
| Standby | 79 hr | 83 hr |
General battery life
Camera
| Matrix | 12 megapixels | 48 megapixels |
| Image resolution | 4032 x 3024 | 8000 x 6000 |
| Zoom | Optical, 2x | Digital |
| Flash | Dual LED | LED |
| Stabilization | Optical | Digital |
| 8K video recording | No | No |
| 4K video recording | Up to 60FPS | Up to 30FPS |
| 1080p video recording | Up to 240FPS | Up to 30FPS |
| Slow motion | 960 FPS (720p) | 960 FPS (720p) |
| Angle of widest lens | - | 120° |
| Lenses | 2 (12 MP + 12 MP) | 4 (48 MP + 12 MP + 5 MP + 5 MP) |
| Wide (main) lens |
- 12 MP
- Aperture: f/1.5 - 2.4 - Focal length: 26 mm - Pixel size: 1.4 micron - Sensor: 1/2.55", Samsung SAK2L3 (ISOCELL CMOS) - Phase autofocus (Dual Pixel) - Optical stabilization |
- 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 |
| Telephoto lens |
- 12 MP
- Aperture: f/2.4 - Focal length: 52 mm - Pixel size: 1 micron - Sensor: 1/3.6" (CMOS) - Phase autofocus (Dual Pixel) - Optical stabilization |
- |
| Ultra-wide lens | - |
- 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 - Pixel size: 1.12 micron - Sensor: 1/5.0" (CMOS) |
| Camera features |
- Bokeh mode
- Pro mode |
- Bokeh mode
- Pro mode |
| Samples | Photo samples of Samsung Galaxy S9 Plus from DxOMark | - |
| Megapixels | 8 megapixels | 32 megapixels |
| Image resolution | 3264 x 2448 | 6560 x 4928 |
| Aperture | f/1.7 | f/2.2 |
| Focal length | 25 mm | 26 mm |
| Pixel size | 1.22 microns | 0.8 microns |
| Sensor type | ISOCELL CMOS | ISOCELL CMOS |
| Sensor size | 1/3.6" | 1/2.8" |
| Video resolution | 1440p at 30 FPS | 2160p (4K) at 30 FPS |
DxOMark camera tests
Photo quality
Video quality
Generic camera score
Connectivity
| 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, LE, 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 | 3.1 | 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 |
| 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 * | 18 | 12 |
| 5G support | No | No |
Sound
| Speakers | Stereo | Mono |
| Headphone audio jack | Yes | Yes |
| FM radio | No | Yes |
| Dolby Atmos | Yes | Yes |
Speakers test
Max loudness
Other
| Category | Flagship | Mid-range |
| Announced | February 2018 | December 2019 |
| Release date | March 2018 | December 2019 |
| SAR (head) | 0.294 W/kg | 0.596 W/kg |
| SAR (body) | 1.35 W/kg | 1.45 W/kg |
| Sensors |
- Barometer
- 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
If the display, performance, gaming, connectivity, design, and sound are more important to you, then choose the Samsung Galaxy S9 Plus . But if the battery life and software are more of a priority – go for the Samsung Galaxy A51 .
