Home Phone comparison Samsung Galaxy M51 and OnePlus 15 - Which is better?

Samsung Galaxy M51 vs OnePlus 15

53 out 100
Samsung Galaxy M51
VS
91 out 100
OnePlus 15
Samsung Galaxy M51
OnePlus 15

Compared 2 smartphones : Samsung Galaxy M51 Manufactured in September, 2020, with display 6.7 with chipsetQualcomm Snapdragon 730G, vs OnePlus 15, Manufactured in October, 2025 with chipsetQualcomm Snapdragon 8 Elite Gen 5. Below are specs, tests, pros and cons for each device

  1. Differences
  2. Review
  3. Specs
  4. Benchmarks
  5. Battery Life
  6. Cameras
  7. Comments (0)

Key Differences

Device key advantages
Reasons to choose Samsung Galaxy M51
  • Supports Dolby Atmos
Reasons to choose OnePlus 15
  • Larger display: 6.78in
  • Higher pixel density: 450ppi
  • Higher refresh rate: 165Hz
  • Lighter design: 211g vs 213g
  • Higher battery capacity: 7300mAh vs 7000mAh
  • Newer Bluetooth version: 6.0 vs 5
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Infrared port
  • Built-in eSIM
  • Includes charger

Versions

Available versions and configurations
Memory Options - 6/128 GB
- 8/128 GB		 - 12/256 GB
- 12/512 GB
- 16/256 GB
- 16/512 GB
- 16/1024 GB

Review

Key Specs Samsung Galaxy M51 and OnePlus 15
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
NanoReview Score
Overall score by NanoReview
Adjust each parameter’s importance to find the best match for you.
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Function
Importance (Weight)
Display:
Camera:
Performance:
Gaming:
Battery:
Connectivity:
Higher weight means greater impact on NanoReview score.

Tests & specs

Specs & test comparison
Smartphones:
Samsung Galaxy M51
vs
OnePlus 15

Display

Display quality comparison
Type Super AMOLED AMOLED
Size 6.7 in 6.78 in
Resolution 1080x2400 pixels 1272x2772 pixels
Aspect ratio 20:9 19.5:9
Pixel density 393 ppi 450 ppi
Refresh rate 60 Hz 165 Hz
Adaptive refresh rate No Yes (1-120 Hz)
Max brightness 650 nits 1800 nits
HDR support No Yes, Dolby Vision
Screen-to-body ratio 86.6 % 91.2 %
Features Always-On Display - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy M51
675 nits
OnePlus 15
n/a
sRGB gamut97.6 %n/a
PWM (Flicker)255 Hzn/a
Response time8 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy M51]

Design & Build

Design and ergonomics comparison
Height 163.9 mm (6.45 in) 161.4 mm (6.35 in)
Width 76.3 mm (3 in) 76.7 mm (3.02 in)
Thickness 9.5 mm (0.37 in) 8.1 mm (0.32 in)
Weight 213 g (7.51 oz) 211 g (7.44 oz)
Water resistance No IP69
Cooling system n/a Vapor chamber
Back panel Plastic Glass
Frame Plastic Metal
Colors - White
- Black		 - Black
- Gold
- Purple
Fingerprint sensor Yes In-Button Yes, In-Display
Screen-to-body ratio
Samsung Galaxy M51
86.6 %
OnePlus 15
91.2 %

Performance

Testing Samsung Galaxy M51 and OnePlus 15 In benchmarks
Processor
Chipset Qualcomm Snapdragon 730G Qualcomm Snapdragon 8 Elite Gen 5
Max Frequency 2200 MHz 4600 MHz
CPU Cores 8 (2 + 6) 8 (2 + 6)
Architecture - 6/1.8 (Kryo 470 Silver (Cortex-A55))
- 2/2.2 (Kryo 470 Gold (Cortex-A76))		 6/3.63 ()
Process Samsung TSMC
Transistor Size 8 nm 3 nm
Neural Processor Qualcomm Hexagon 688 Hexagon
Graphics Adreno 618 Adreno 840
GPU Cores 256 1536
GPU Frequency 700 MHz 1200 MHz
FLOPS 358.4 GFLOPS 3686.4 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy M51
671
OnePlus 15
3726
Geekbench 6 (Multi-Core)
Samsung Galaxy M51
1799
OnePlus 15
11199
Geekbench 6 (Single-Core)6713726
Geekbench 6 (Multi-Core)179911199
Geekbench Compute (GPU)n/a27829
Sources: Geekbench v6 [OnePlus 15]
AnTuTu 10
AnTuTu 10
Samsung Galaxy M51
323135
OnePlus 15
3434737
CPU111824968935
GPU660591235307
Memory60319489823
UX84933740672
NanoReview Score3231353434737
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy M51
738
OnePlus 15
n/a
Max Surface Temp.48.2 °Cn/a
Stability97 %n/a
Graphics Test4 fpsn/a
Graphics Score738n/a
Sources: 3DMark [Samsung Galaxy M51]

Memory

RAM
RAM Size - 6 GB
- 8 GB		 12 GB
Memory Type LPDDR4X LPDDR5X
Memory Frequency 1866 MHz 5300 MHz
Channels 2 4
Storage
Storage Capacity128 GB256 GB
Storage TypeUFS 2.1UFS 4.1
Memory CardMicroSDNo

Software

OS Android 10 (Upgradeable to Android 12) Android 16
OS Size 22 GB n/a
UI Skin One UI 4.1 OxygenOS 16

Battery

Volume 7000 mAh 7300 mAh
Max Charging Power 25 W 120 W
Battery Type Li-ion Silicon Carbon (Si/C)
Removable No No
Wireless Charging No Yes (50 W)
Reverse Charging Yes Yes, (Wireless)
Fast Charging Yes (35% in 30 min) Yes (50% in 15 min)
Full Charge Time 1:47 h 0:43 h
Battery Life Test
Battery Life
Samsung Galaxy M51
31:29
OnePlus 15
n/a
Web Browsing12:03 hn/a
Video Playback16:42 hn/a
Games06:23 hn/a
Standby Mode171 hn/a

Main camera

Matrix 64 MP 50 MP
Photo resolution 9248x6920 pixels 8192x6144 pixels
Zoom Digital Optical, 3.5x
Flash LED Dual LED
Stabilization Digital Optical
8K Recording No Yes (Up to 30 fps)
4K Recording Yes (Up to 30 fps) Yes (Up to 120 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
Slow Motion 240 fps (720p) n/a
Wide-angle lens 123 ° 116 °
Lenses count Standard: 64 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP		 Standard: 50 MP
Telephoto: 50 MP
Ultra-wide: 50 MP
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
- RAW support
Main lens
Matrix64 MP50 MP
Aperturef/1.8f/1.8
Focal length26 mm24 mm
SensorSony IMX682Sony LYTIA-T808
Sensor size1/1.71/1.56
Pixel size0.8 μm1 μm
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalOptical
Telephoto
Matrixn/a50 MP
Aperturen/af/2.8
Focal lengthn/a85 mm
Sensorn/aSamsung S5KJN5
Sensor sizen/a1/2.76
Pixel sizen/a0.64 μm
Stabilizationn/aOptical
Ultra-wide lens
Matrix12 MP50 MP
Aperturef/2.2f/2.0
Focal lengthn/a15 mm
SensorSamsung S5K3L6Samsung S5KJN5
Sensor size1/3.11/2.76
Pixel size1.12 μm0.64 μm
StabilizationDigitalDigital

Front camera

Matrix 32 MP 32 MP
Photo resolution 6464x4864 pixels 6560x4928 pixels
Aperture f/2.2 f/2.4
Focal length 26 mm 21 mm
Sensor Sony IMX616 Sony IMX615
Sensor size 1/2.8 1/2.74
Pixel size 0.8 μm 0.8 μm
Autofocus No Phase autofocus
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 2160p (4K) at 60 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be)
Wi-Fi features - Dual Band
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display		 - Dual Band
- Wi-Fi MiMO
- Wi-Fi Direct
- Wi-Fi Hotspot
- Wi-Fi Display
Bluetooth version 5 6.0
Bluetooth features LE, A2DP LE
USB type USB Type-C USB Type-C
USB version 2 3.2
USB features - Charging
- USB Storage Mode		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a Yes
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
- NAVIC
NFC* Yes Yes
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoYes
Hybrid SlotNoNo
2G BandsGSM850, GSM900, DCS1800, PCS1900n/a
3G BandsWCDMA B1 (2100), B2 (1900), B4(AWS), B5(850), B8 (900)n/a
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B17/B20/B26/B28/B66)n/a
LTE category15n/a
5G SupportNoYes

Sound

Speakers Mono n/a
3.5 mm Jack Yes No
FM Radio Yes No
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy M51
89.9 dB
OnePlus 15
n/a

Other

Class Mid-range Flagship
Announced August, 2020 yr October, 2025 yr
Release Date September, 2020 yr October, 2025 yr
Launch Price ($) 340 n/a
MSRP ($) n/a 899
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included n/a Yes, 120 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider OnePlus 15 the clear winner in this comparison.

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