Home Phone comparison Samsung Galaxy S25 and Realme C51 - Which is better?

Samsung Galaxy S25 vs Realme C51

87 out 100
Samsung Galaxy S25
VS
44 out 100
Realme C51
Samsung Galaxy S25
Realme C51

Compared 2 smartphones : Samsung Galaxy S25 Manufactured in February, 2025, with display 6.2 with chipsetQualcomm Snapdragon 8 Elite, vs Realme C51, Manufactured in August, 2023with chipsetUnisoc Tiger T612. 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 S25
  • Higher pixel density: 416ppi
  • Higher refresh rate: 120Hz
  • Lighter design: 162g vs 186g
  • Newer Bluetooth version: 5.4 vs 5
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Supports Dolby Atmos
  • Built-in eSIM
Reasons to choose Realme C51
  • Larger display: 6.74in
  • Higher battery capacity: 5000mAh vs 4000mAh
  • Includes charger

Versions

Available versions and configurations
Memory Options - 12/128 GB
- 12/256 GB
- 12/512 GB		 - 3/64 GB
- 4/64 GB
- 4/128 GB
- 6/256 GB

Review

Key Specs Samsung Galaxy S25 and Realme C51
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 S25
vs
Realme C51

Display

Display quality comparison
Type Dynamic AMOLED IPS LCD
Size 6.2 in 6.74 in
Resolution 1080x2340 pixels 720x1600 pixels
Aspect ratio 19.5:9 20:9
Pixel density 416 ppi 260 ppi
Refresh rate 120 Hz 90 Hz
Adaptive refresh rate Yes (1-120 Hz) No
Max brightness 2600 nits 560 nits
HDR support Yes HDR10+ No
Touch Sampling Rate 240 Hz 180 Hz
Screen-to-body ratio 91.1 % 85.6 %
Features - DCI-P3
- Always-On Display		 n/a
Display test
Peak brightness (auto)
Samsung Galaxy S25
1406 nits
Realme C51
n/a
sRGB gamut97.4 %n/a
PWM (Flicker)240 Hzn/a
Response time2 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy S25]

Design & Build

Design and ergonomics comparison
Height 146.9 mm (5.78 in) 167.2 mm (6.58 in)
Width 70.5 mm (2.78 in) 76.7 mm (3.02 in)
Thickness 7.2 mm (0.28 in) 7.99 mm (0.31 in)
Weight 162 g (5.71 oz) 186 g (6.56 oz)
Water resistance IP68 No
Cooling system Vapor chamber n/a
Back panel Glass Plastic
Frame Metal Plastic
Colors - Black
- Silver
- Gray
- Blue
- Green
- Pink		 - Black
- Green
Fingerprint sensor Yes In-Display Yes In-Button
Screen-to-body ratio
Samsung Galaxy S25
91.1 %
Realme C51
85.6 %

Performance

Testing Samsung Galaxy S25 and Realme C51 In benchmarks
Processor
Chipset Qualcomm Snapdragon 8 Elite Unisoc Tiger T612
Max Frequency 4470 MHz 1800 MHz
CPU Cores 8 (2 + 6) 8 (2 + 6)
Architecture - 6/3.53 (Oryon (Phoenix M))
- 2/4.32 (Oryon (Phoenix L))		 - 6/1.8 (Cortex-A55)
- 2/1.8 (Cortex-A75)
Process TSMC TSMC
Transistor Size 3 nm 12 nm
Neural Processor Hexagon n/a
Graphics Adreno 830 Mali-G57 MP1
GPU Cores 1536 32
GPU Frequency 1100 MHz 614 MHz
FLOPS 3379.2 GFLOPS 78.6 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy S25
3075
Realme C51
415
Geekbench 6 (Multi-Core)
Samsung Galaxy S25
9822
Realme C51
1476
Geekbench 6 (Single-Core)3075415
Geekbench 6 (Multi-Core)98221476
Geekbench Compute (GPU)26264n/a
Sources: Geekbench v6 [Samsung Galaxy S25], [Realme C51]
AnTuTu 10
AnTuTu 10
Samsung Galaxy S25
2382973
Realme C51
244837
CPU58013985532
GPU96129923310
Memory47874166023
UX36279469972
NanoReview Score2382973244837

Memory

RAM
RAM Size 12 GB 4 GB
Memory Type LPDDR5X LPDDR4X
Memory Frequency 5333 MHz 1866 MHz
Channels 2 2
Storage
Storage Capacity128 GB- 64 GB
- 128 GB
Storage TypeUFS 4.0eMMC 5.1
Memory CardNoMicroSD

Software

OS Android 15 Android 13
OS Size 30.1 GB n/a
UI Skin One UI 7.0 Realme UI T

Battery

Volume 4000 mAh 5000 mAh
Max Charging Power 25 W 33 W
Battery Type Li-ion Li-Po
Removable No No
Wireless Charging Yes (15 W) No
Reverse Charging Yes (Wireless) No
Fast Charging Yes (56% in 30 min) Yes (50% in 28 min)
Full Charge Time 1:17 h 1:12 h
Battery Life Test
Battery Life
Samsung Galaxy S25
24:10
Realme C51
n/a
Web Browsing09:09 hn/a
Video Playback17:15 hn/a
Games05:32 hn/a
Standby Mode108 hn/a

Main camera

Matrix 50 MP 50 MP
Photo resolution 8160x6120 pixels 8192x6144 pixels
Zoom Optical, 3x Digital
Flash LED LED
Stabilization Optical Digital
8K Recording Yes (Up to 30 fps) No
4K Recording Yes (Up to 60 fps) No
1080p Recording Yes (Up to 60 fps) Yes (Up to 30 fps)
Slow Motion 240 fps (1080p) 30 fps (480p)
Wide-angle lens 120 ° n/a
Lenses count Standard: 50 MP
Telephoto: 10 MP
Ultra-wide: 12 MP		 Standard: 50 MP
Depth: 0.08 MP
Features - Bokeh effect
- Pro mode
- RAW support		 - Bokeh effect
- Pro mode
Main lens
Matrix50 MP50 MP
Aperturef/1.8f/1.8
Focal length24 mm27 mm
SensorSamsung ISOCELL S5KGN3Samsung S5KJN1
Sensor size1/1.561/2.76
Pixel size1 μm0.64 μm
AutofocusPhase autofocus (Dual Pixel)Phase autofocus
StabilizationOpticalDigital
Telephoto
Matrix10 MPn/a
Aperturef/2.4n/a
Focal length67 mmn/a
SensorSamsung ISOCELL S5K3K1n/a
Sensor size1/3.94n/a
Pixel size1 μmn/a
StabilizationOpticaln/a
Ultra-wide lens
Matrix12 MPn/a
Aperturef/2.2n/a
Focal length13 mmn/a
SensorSony IMX564n/a
Sensor size1/2.55n/a
Pixel size1.4 μmn/a
StabilizationDigitaln/a

Front camera

Matrix 12 MP 5 MP
Photo resolution 4000x3000 pixels 3264x2448 pixels
Aperture f/2.2 f/2.2
Focal length 26 mm 28 mm
Sensor Samsung S5K3LU Samsung S5K5E9
Sensor size 1/3.2 1/5
Pixel size 1.12 μm 1.12 μm
Autofocus Phase autofocus No
Stabilization Digital Digital
Video resolution 2160p (4K) at 60 fps 720p at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 7 (802.11 a/b/g/n/ac/ax/be) 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 5.4 5
Bluetooth features LE LE
USB type USB Type-C USB Type-C
USB version 3.2 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort Yes DP 1.2 n/a
GPS - GPS
- GLONASS
- Beidou
- Galileo
- QZSS		 - GPS
- GLONASS
- Beidou
- Galileo
NFC* Yes Varies by region
Infrared Port No No
Connectivity
SIM Count*12
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *YesNo
Hybrid SlotNoNo
2G BandsGSM850,GSM900,DCS1800,PCS1900GSM 850/900/1800/1900MHz
3G BandsUMTS B1(2100),B2(1900),B4(AWS),B5(850),B8(900)WCDMA 1/5/8
LTE Bands*LTE (B1/B2/B3/B4/B5/B7/B8/B12/B13/B14/B18/B19/B20/B25/B26/B28/B29/B30/B66/B71)LTE (B1/B3/B5/B8/B38/B40/B41)
LTE categoryn/a7
5G SupportYesNo

Sound

Speakers n/a Mono
3.5 mm Jack No Yes
FM Radio No No
Dolby Atmos Yes No
Speaker Test
Max Volume
Samsung Galaxy S25
91.7 dB
Realme C51
n/a

Other

Class Flagship Budget
Announced January, 2025 yr July, 2023 yr
Release Date February, 2025 yr August, 2023 yr
Launch Price ($) n/a 160
MSRP ($) 799 n/a
Sensors - Hall Sensor
- Barometer
- Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Proximity Sensor
- Accelerometer
- Compass
- Fingerprint sensor
Charger Included No Yes 33 W

Note

Samsung Galaxy S25:

Supports up to 2 eSIMs. The international model has 2 physical SIM slots, while the U.S. model has 1.

* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Samsung Galaxy S25 the clear winner in this comparison.

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