Home Phone comparison Samsung Galaxy A51 and Samsung Galaxy S25 FE - Which is better?

Samsung Galaxy A51 vs Samsung Galaxy S25 FE

41 out 100
Samsung Galaxy A51
VS
80 out 100
Samsung Galaxy S25 FE
Samsung Galaxy A51
Samsung Galaxy S25 FE

Compared 2 smartphones : Samsung Galaxy A51 Manufactured in December, 2019, with display 6.5 with chipsetSamsung Exynos 9 Octa 9611, vs Samsung Galaxy S25 FE, Manufactured in September, 2025with chipsetSamsung Exynos 2400. 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 A51
  • Higher pixel density: 405ppi
  • Lighter design: 172g vs 190g
Reasons to choose Samsung Galaxy S25 FE
  • Larger display: 6.7in
  • Higher refresh rate: 120Hz
  • Higher battery capacity: 4900mAh vs 4000mAh
  • Newer Bluetooth version: 5.4 vs 5
  • Supports newer USB: 3.2 vs 2
  • Supports DisplayPort
  • Built-in eSIM

Versions

Available versions and configurations
Memory Options - 4/64 GB
- 4/128 GB
- 6/128 GB
- 8/128 GB
- 8/256 GB		 - 8/128 GB
- 8/256 GB
- 8/512 GB

Review

Key Specs Samsung Galaxy A51 and Samsung Galaxy S25 FE
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 A51
vs
Samsung Galaxy S25 FE

Display

Display quality comparison
Type Super AMOLED Dynamic AMOLED
Size 6.5 in 6.7 in
Resolution 1080x2400 pixels 1080x2340 pixels
Aspect ratio 20:9 19.5:9
Pixel density 405 ppi 385 ppi
Refresh rate 60 Hz 120 Hz
Adaptive refresh rate No Yes (60-120 Hz)
Max brightness 400 nits 1300 nits
HDR support No Yes, HDR10+
Screen-to-body ratio 87.5 % 89.2 %
Features Always-On Display - DCI-P3
- Always-On Display
Display test
Peak brightness (auto)
Samsung Galaxy A51
631 nits
Samsung Galaxy S25 FE
n/a
sRGB gamut98.8 %n/a
PWM (Flicker)242 Hzn/a
Response time25 msn/a
Contrast∞ Infiniten/a
Sources: NotebookCheck [Samsung Galaxy A51]

Design & Build

Design and ergonomics comparison
Height 158.5 mm (6.24 in) 161.3 mm (6.35 in)
Width 73.6 mm (2.9 in) 76.6 mm (3.02 in)
Thickness 7.9 mm (0.31 in) 7.4 mm (0.29 in)
Weight 172 g (6.07 oz) 190 g (6.7 oz)
Water resistance No IP68
Cooling system n/a Vapor chamber
Back panel Plastic Glass
Frame Plastic Metal
Colors - White
- Black		 - White
- Black
- Gray
- Blue
- Yellow
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Samsung Galaxy A51
87.5 %
Samsung Galaxy S25 FE
89.2 %

Performance

Testing Samsung Galaxy A51 and Samsung Galaxy S25 FE In benchmarks
Processor
Chipset Samsung Exynos 9 Octa 9611 Samsung Exynos 2400
Max Frequency 2300 MHz 3200 MHz
CPU Cores 8 (4 + 4) 10 (1 + 2 + 3 + 4)
Architecture - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)		 - 4/1.95 (Cortex-A520)
- 3/2.6 (Cortex-A720)
- 2/2.9 (Cortex-A720)
- 1/3.21 (Cortex-X4)
Process Samsung Samsung
Transistor Size 10 nm 4 nm
Neural Processor Yes Yes
Graphics Mali-G72 MP3 Samsung Xclipse 940
GPU Cores 54 768
GPU Frequency 850 MHz 1095 MHz
FLOPS 113.8 GFLOPS 3406.8 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy A51
512
Samsung Galaxy S25 FE
2116
Geekbench 6 (Multi-Core)
Samsung Galaxy A51
1556
Samsung Galaxy S25 FE
7035
Geekbench 6 (Single-Core)5122116
Geekbench 6 (Multi-Core)15567035
Geekbench Compute (GPU)n/a18270
Sources: Geekbench v6 [Samsung Galaxy S25 FE]
AnTuTu 10
AnTuTu 10
Samsung Galaxy A51
268760
Samsung Galaxy S25 FE
1801002
CPU83857429356
GPU45166715844
Memory63828352083
UX75909303719
NanoReview Score2687601801002
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy A51
812
Samsung Galaxy S25 FE
n/a
Max Surface Temp.42.2 °Cn/a
Stability95 %n/a
Graphics Test4 fpsn/a
Graphics Score812n/a
Sources: 3DMark [Samsung Galaxy A51]

Memory

RAM
RAM Size - 4 GB
- 6 GB		 8 GB
Memory Type LPDDR4X LPDDR5X
Memory Frequency 1866 MHz n/a
Channels 2 4
Storage
Storage Capacity- 64 GB
- 128 GB		128 GB
Storage TypeUFS 2.0UFS 4.0
Memory CardMicroSDNo

Software

OS Android 10 (Upgradeable to Android 13) Android 16
OS Size 23 GB 23.8 GB
UI Skin One UI 5.1 One UI 8.0

Battery

Volume 4000 mAh 4900 mAh
Max Charging Power 15 W 45 W
Battery Type Li-Po Li-ion
Removable No No
Wireless Charging No Yes (25 W)
Reverse Charging No Yes, (Wireless)
Fast Charging Yes (40% in 35 min) Yes (65% in 30 min)
Full Charge Time 1:50 h n/a
Battery Life Test
Battery Life
Samsung Galaxy A51
17:53
Samsung Galaxy S25 FE
n/a
Web Browsing07:15 hn/a
Video Playback11:25 hn/a
Games04:49 hn/a
Standby Mode81 hn/a

Main camera

Matrix 48 MP 50 MP
Photo resolution 8000x6000 pixels 8160x6120 pixels
Zoom Digital Optical, 3x
Flash LED 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 120 fps)
Slow Motion 960 fps (720p) 960 fps (720p)
Wide-angle lens 120 ° 123 °
Lenses count Standard: 48 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP		 Standard: 50 MP
Telephoto: 8 MP
Ultra-wide: 12 MP
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
Main lens
Matrix48 MP50 MP
Aperturef/2.0f/1.8
Focal length26 mm24 mm
SensorSony IMX582n/a
Sensor size1/21/1.57
Pixel size0.8 μm1 μm
AutofocusPhase autofocusPhase autofocus (Dual Pixel)
StabilizationDigitalOptical
Telephoto
Matrixn/a8 MP
Aperturen/af/2.4
Focal lengthn/a75 mm
Sensor sizen/a1/4.4
Pixel sizen/a1 μm
Stabilizationn/aOptical
Ultra-wide lens
Matrix12 MP12 MP
Aperturef/2.2f/2.2
Focal length13 mm13 mm
Sensor sizen/a1/3.0
Pixel size1.12 μm1.12 μm
StabilizationDigitalDigital

Front camera

Matrix 32 MP 12 MP
Photo resolution 6560x4928 pixels n/a
Aperture f/2.2 f/2.2
Focal length 26 mm 26 mm
Sensor Samsung S5KGD1 CMOS
Sensor size 1/2.8 1/3.2
Pixel size 0.8 μm 1.12 μm
Autofocus No No
Stabilization Digital Digital
Video resolution 2160p (4K) at 30 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 6E (802.11 a/b/g/n/ac/ax)
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 5.4
Bluetooth features PBAP/PAB, PAN, OPP, MAP, HSP, HID, HFP, DIP, AVRCP, A2DP LE
USB type USB Type-C USB Type-C
USB version 2 3.2
USB features - Charging
- USB Storage Mode
- OTG		 - 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 No
Connectivity
SIM Count*21
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoYes
Hybrid SlotNoNo
2G BandsGSM 850 / 900 / 1800 / 2100 / 2600GSM850, GSM900, DCS1800, PCS1900
3G BandsUMTS 850 / 900 / 1900 / 2100UMTS B1(2100), B2(1900), B4(AWS), B5(850), B8(900)
LTE Bands*LTE (B850/B900/B1800/B2100/B2600)LTE (B1/B2/B3/B4/B5/B7/B8/B12/B17/B18/B19/B20/B25/B26/B28/B32/B66)
LTE category1220
5G SupportNoYes

Sound

Speakers Mono n/a
3.5 mm Jack Yes No
FM Radio Yes No
Dolby Atmos Yes Yes
Speaker Test
Max Volume
Samsung Galaxy A51
81.7 dB
Samsung Galaxy S25 FE
n/a

Other

Class Mid-range Flagship
Announced December, 2019 yr September, 2025 yr
Release Date December, 2019 yr September, 2025 yr
Launch Price ($) 399 n/a
MSRP ($) n/a 649
Sensors - Proximity Sensor
- Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor		 - Gyroscope
- Accelerometer
- Ambient Light Sensor
- Compass
- Fingerprint sensor
Charger Included n/a No
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

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

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