Home Phone comparison Samsung Galaxy A51 and Realme 15 5G (Global) - Which is better?

Samsung Galaxy A51 vs Realme 15 5G (Global)

41 out 100
Samsung Galaxy A51
VS
72 out 100
Realme 15 5G (Global)
Samsung Galaxy A51
Realme 15 5G (Global)

Compared 2 smartphones : Samsung Galaxy A51 Manufactured in December, 2019, with display 6.5 with chipsetSamsung Exynos 9 Octa 9611, vs Realme 15 5G (Global), Manufactured in November, 2025 with chipsetMediaTek Dimensity 7300 Plus. 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 185g
  • Supports Dolby Atmos
Reasons to choose Realme 15 5G (Global)
  • Larger display: 6.77in
  • Higher refresh rate: 144Hz
  • Higher battery capacity: 7000mAh vs 4000mAh
  • Newer Bluetooth version: 5.4 vs 5
  • Infrared port
  • Includes charger

Versions

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

Review

Key Specs Samsung Galaxy A51 and Realme 15 5G (Global)
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
Realme 15 5G (Global)

Display

Display quality comparison
Type Super AMOLED AMOLED
Size 6.5 in 6.77 in
Resolution 1080x2400 pixels 1080x2392 pixels
Aspect ratio 20:9 19.5:9
Pixel density 405 ppi 388 ppi
Refresh rate 60 Hz 144 Hz
Adaptive refresh rate No Yes
Max brightness 400 nits 1600 nits
HDR support No Yes, HDR10+
Touch Sampling Rate n/a 240 Hz
Screen-to-body ratio 87.5 % 90.8 %
Features Always-On Display - DCI-P3
- Always-On Display
- DC dimming
Display test
Peak brightness (auto)
Samsung Galaxy A51
631 nits
Realme 15 5G (Global)
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) 163.34 mm (6.43 in)
Width 73.6 mm (2.9 in) 75.88 mm (2.99 in)
Thickness 7.9 mm (0.31 in) 7.66 mm (0.3 in)
Weight 172 g (6.07 oz) 185 g (6.53 oz)
Water resistance No IP69
Back panel Plastic n/a
Frame Plastic Plastic
Colors - White
- Black		 - Gray
- Pink
- Purple
Fingerprint sensor Yes In-Display Yes, In-Display
Screen-to-body ratio
Samsung Galaxy A51
87.5 %
Realme 15 5G (Global)
90.8 %

Performance

Testing Samsung Galaxy A51 and Realme 15 5G (Global) In benchmarks
Processor
Chipset Samsung Exynos 9 Octa 9611 MediaTek Dimensity 7300 Plus
Max Frequency 2300 MHz 2600 MHz
CPU Cores 8 (4 + 4) 8 (4 + 4)
Architecture - 4/1.7 (Cortex-A53)
- 4/2.3 (Cortex-A73)		 - 4/2 (Cortex-A55)
- 4/2.5 (Cortex-A78)
Process Samsung TSMC
Transistor Size 10 nm 4 nm
Neural Processor Yes MediaTek APU 655
Graphics Mali-G72 MP3 Mali-G615 MP2
GPU Cores 54 256
GPU Frequency 850 MHz 1047 MHz
FLOPS 113.8 GFLOPS 536.1 GFLOPS
GeekBench v6
Geekbench 6 (Single-Core)
Samsung Galaxy A51
512
Realme 15 5G (Global)
1012
Geekbench 6 (Multi-Core)
Samsung Galaxy A51
1556
Realme 15 5G (Global)
2976
Geekbench 6 (Single-Core)5121012
Geekbench 6 (Multi-Core)15562976
AnTuTu 10
AnTuTu 10
Samsung Galaxy A51
268760
Realme 15 5G (Global)
730248
CPU83857218026
GPU45166151416
Memory63828187569
UX75909173237
NanoReview Score268760730248
3DMark Wild Life
3DMark Wild Life
Samsung Galaxy A51
812
Realme 15 5G (Global)
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		 12 GB
Memory Type LPDDR4X LPDDR4X
Memory Frequency 1866 MHz 2133 MHz
Channels 2 2
Storage
Storage Capacity- 64 GB
- 128 GB		256 GB
Storage TypeUFS 2.0UFS 3.1
Memory CardMicroSDNo

Software

OS Android 10 (Upgradeable to Android 13) Android 15
OS Size 23 GB n/a
UI Skin One UI 5.1 Realme UI 6.0

Battery

Volume 4000 mAh 7000 mAh
Max Charging Power 15 W 80 W
Battery Type Li-Po Silicon Carbon (Si/C)
Removable No No
Wireless Charging No No
Reverse Charging No No
Fast Charging Yes (40% in 35 min) Yes (50% in 26 min)
Full Charge Time 1:50 h 0:62 h
Battery Life Test
Battery Life
Samsung Galaxy A51
17:53
Realme 15 5G (Global)
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 8192x6144 pixels
Zoom Digital Digital
Flash LED Dual LED
Stabilization Digital Optical
8K Recording No No
4K Recording Yes (Up to 30 fps) Yes (Up to 30 fps)
1080p Recording Yes (Up to 30 fps) Yes (Up to 60 fps)
Slow Motion 960 fps (720p) 240 fps (720p)
Wide-angle lens 120 ° 112 °
Lenses count Standard: 48 MP
Ultra-wide: 12 MP
Macro: 5 MP
Depth: 5 MP		 Standard: 50 MP
Ultra-wide: 8 MP
Features - Bokeh effect
- Pro mode		 - Bokeh effect
- Pro mode
Main lens
Matrix48 MP50 MP
Aperturef/2.0f/1.8
Focal length26 mm26 mm
SensorSony IMX582Sony IMX882
Sensor size1/21/1.95 (0.51)
Pixel size0.8 μmn/a
AutofocusPhase autofocusPhase autofocus
StabilizationDigitalOptical
Ultra-wide lens
Matrix12 MP8 MP
Aperturef/2.2f/2.2
Focal length13 mm16 mm
Pixel size1.12 μmn/a
StabilizationDigitalDigital

Front camera

Matrix 32 MP 50 MP
Photo resolution 6560x4928 pixels 8192x6144 pixels
Aperture f/2.2 f/2.4
Focal length 26 mm 23 mm
Sensor Samsung S5KGD1 CMOS
Sensor size 1/2.8 n/a
Pixel size 0.8 μm n/a
Autofocus No No
Stabilization Digital Digital
Video resolution 2160p (4K) at 30 fps 2160p (4K) at 30 fps
TOF 3D sensor No No

Connectivity

Wi-Fi version Wi-Fi 5 (802.11 a/b/g/n/ac) Wi-Fi 6 (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 2
USB features - Charging
- USB Storage Mode
- OTG		 - Charging
- USB Storage Mode
- OTG
DisplayPort n/a No
GPS - GPS
- GLONASS
- Beidou
- Galileo		 - GPS
- GLONASS
- Beidou
- Galileo
- QZSS
NFC* Yes No
Infrared Port No Yes
Connectivity
SIM Count*22
SIM TypeNanoNano
SIM ModeDual SIM StandbyDual SIM Standby
eSIM Support *NoNo
Hybrid SlotNoNo
2G BandsGSM 850 / 900 / 1800 / 2100 / 2600GSM 900/1800MHz
3G BandsUMTS 850 / 900 / 1900 / 2100WCDMA 900/2100MHz
LTE Bands*LTE (B850/B900/B1800/B2100/B2600)LTE (B1/B3/B5/B8/B40)
LTE category12n/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 A51
81.7 dB
Realme 15 5G (Global)
n/a

Other

Class Mid-range Mid-range
Announced December, 2019 yr September, 2025 yr
Release Date December, 2019 yr November, 2025 yr
Launch Price ($) 399 n/a
MSRP ($) n/a 350
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, 80 W
* Attention! Config, frequencies, NFC, and other specs may vary by region.

Results

After analyzing the data, we consider Realme 15 5G (Global) the clear winner in this comparison.

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