Samsung Galaxy A51
Samsung Galaxy S6
Samsung Galaxy A51
Samsung Galaxy S6
How is Samsung Galaxy A51 better than Samsung Galaxy S6?
Bigger battery capacity: 4000 mAh vs 2550 mAh
Faster CPU speed: 4 x 2.3 GHz & 4 x 1.7 GHz vs 4 x 2.1 GHz & 4 x 1.5 GHz
More RAM memory capacity in max option: 4GB, 6GB, 8GB vs 3GB
More internal storage in max option: 64GB, 128GB, 256GB vs 32GB, 64GB, 128GB
More megapixels main camera: 48 MP & 12 MP & 5 MP & 5 MP vs 16 MP
More megapixels front camera: 32MP vs 5MP
Has a larger display diagonal: 6.5" vs 5.1"
Higher charging speed: 25W vs 15W
The phone is 4 years and 8 months newer
Samsung Galaxy A51
Samsung Galaxy S6
How is Samsung Galaxy S6 better than Samsung Galaxy A51?
Better display resolution: 1440 x 2560 px vs 1080 x 2400 px
Lighter: 138 g (4.87 ounces) vs 172 g (6.07 ounces)
Narrower: 70.5 mm (2.78 inches) vs 73.6 mm (2.9 inches)
Shorter: 143.4 mm (5.65 inches) vs 158.5 mm (6.24 inches)
Samsung Galaxy A51
Samsung Galaxy S6
Height
158.5 mm
(6.24 inches)
Width
73.6 mm
(2.9 inches)
Thickness
7.9 mm
(0.31 inches)
Screen size
6.5"
Weight
172 g
(6.07 ounces)
Height
143.4 mm
(5.65 inches)
Width
70.5 mm
(2.78 inches)
Thickness
6.8 mm
(0.27 inches)
Screen size
5.1"
Weight
138 g
(4.87 ounces)
Height
158.5 mm
(6.24 inches)
Width
73.6 mm
(2.9 inches)
Thickness
7.9 mm
(0.31 inches)
Screen size
6.5"
Weight
172 g
(6.07 ounces)
Height
143.4 mm
(5.65 inches)
Width
70.5 mm
(2.78 inches)
Thickness
6.8 mm
(0.27 inches)
Screen size
5.1"
Weight
138 g
(4.87 ounces)
Samsung Galaxy A51
Samsung Galaxy S6
Samsung Galaxy A51
Samsung Galaxy S6
Score 3.6
Score 4.3
Samsung Galaxy A51
Samsung Galaxy S6
Samsung Galaxy A51
Samsung Galaxy S6
Score 3.6
Score 4.3
CNet
Samsung Galaxy A51
Samsung Galaxy S6

TechRadar
Samsung Galaxy A51
Samsung Galaxy S6

Tech Advisor
Samsung Galaxy A51
Samsung Galaxy S6

PhoneArena
Samsung Galaxy A51
Samsung Galaxy S6

PCMag
Samsung Galaxy A51
Samsung Galaxy S6

Smartprix
Samsung Galaxy A51
Samsung Galaxy S6
Samsung Galaxy A51
Samsung Galaxy S6
Show differences
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Specs
Samsung Galaxy A51
Samsung Galaxy S6
Design
Weight
172 g (6.07 ounces)
138 g (4.87 ounces)
Thickness
7.9 mm (0.31 inches)
6.8 mm (0.27 inches)
Width
73.6 mm (2.9 inches)
70.5 mm (2.78 inches)
Height
158.5 mm (6.24 inches)
143.4 mm (5.65 inches)
Volume
92.16 cm³
-
Color options
Prism Crush Black, Prism Crush White, Prism Crush Blue, Prism Crush Pink
White Pearl, Black Sapphire, Gold Platinum, Blue Topaz
Display
Screen size
6.5"
5.1"
Display type
OLED/AMOLED
OLED/AMOLED
Pixel density
405 ppi
577 ppi
Resolution
1080 x 2400 px
1440 x 2560 px
Refresh rate
60Hz
60Hz
Has branded damage-resistant glass
✔
✔
Gorilla Glass version
Gorilla Glass 3
-
Always-On Display
✔
-
Contrast ratio
20:1
-
Has a touch screen
✔
✔
Performance
Internal storage
64GB, 128GB, 256GB
32GB, 64GB, 128GB
RAM
4GB, 6GB, 8GB
3GB
Android version
Android 10
Android 8 Oreo
CPU speed
4 x 2.3 GHz & 4 x 1.7 GHz
4 x 2.1 GHz & 4 x 1.5 GHz
GPU clock speed
650 MHz
700 MHz
Has integrated LTE
✔
✔
RAM speed
2133 MHz
1552 MHz
Semiconductor size
10 nm
14 nm
Supports 64-bit
✔
✔
DirectX version
DirectX 12
DirectX 11
Has integrated graphics
✔
✔
OpenGL ES version
3.2
3.2
Uses big.LITTLE technology
✔
✔
CPU threads
8 threads
8 threads
Uses HMP
✔
✔
Has TrustZone
✔
✔
Maximum memory bandwidth
11.92 GB/s
-
OpenCL version
2
1.2
L2 cache
-
2 MB
EMMC version
5.1
-
DDR memory version
4
-
Maximum memory amount
8GB
-
Thermal Design Power (TDP)
8W
-
Release date
2019
2015
Has NX bit
✔
✔
L1 cache
64 KB
48 KB
GPU turbo
850 MHz
-
Memory channels
4
-
Has an external memory slot
✔
-
Maximum amount of external memory supported
1000GB
-
Bits executed at a time
128
128
Number of transistors
3000 million
-
VFP version
4
4
Cameras
Main camera
48 MP & 12 MP & 5 MP & 5 MP
16 MP
Front camera
32MP
5MP
Has built-in optical image stabilization
-
✔
Video recording (main camera)
2160 x 30 fps
2160 x 30 fps
Wide aperture (main camera)
f/2 & f/2.2 & f/2.4 & f/2.2
f/1.9
Has a BSI sensor
✔
✔
Has continuous autofocus when recording movies
-
✔
Has phase-detection autofocus for photos
✔
✔
Supports slow-motion video recording
✔
✔
Has a built-in HDR mode
✔
✔
Has a flash
✔
✔
Has manual exposure
✔
✔
Has a dual-lens (or multi-lens) main camera
✔
-
Optical zoom
0x
0x
Number of flash LEDs
1
1
Has a CMOS sensor
-
✔
Has manual ISO
✔
✔
Has a serial shot mode
✔
✔
Has manual focus
✔
-
Has a front camera
✔
✔
Has manual white balance
✔
✔
Shoots raw
-
✔
Has touch autofocus
✔
✔
Has manual shutter speed
✔
-
Can create panoramas in-camera
✔
✔
Wide aperture (front camera)
f/2.2
-
Has timelapse function
✔
-
Pixel size (main camera)
0.8 µm & 1.12 µm & 1.12 µm & 1.12 µm
-
Operating system
Has theme customization
✔
✔
Has dark mode
✔
-
Has focus modes
✔
-
Has customizable notifications
✔
✔
Supports split screen
✔
✔
Supports instant markup
✔
✔
Supports PiP and PaP
✔
✔
Has sharing intents
✔
✔
Has a child lock
✔
✔
Is free and open source
✔
✔
Tracks the current position of a mobile device
✔
✔
Is a multi-user system
✔
✔
Supports widgets
✔
✔
The browser has word wrap
✔
✔
Has voice commands
✔
✔
Has offline voice recognition
✔
✔
More languages supported
125
125
Battery
Battery power
4000 mAh
2550 mAh
Has wireless charging
-
✔
Supports fast charging
✔
✔
Charging speed
25W
15W
Wireless charging speed
-
5W
Has a battery level indicator
✔
✔
Has a rechargeable battery
✔
✔
Audio
Has aptX
-
✔
Number of microphones
2
2
Has a socket for a 3.5 mm audio jack
✔
✔
Has a radio
✔
-
Features
Wi-Fi version
Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
Wi-Fi 5 (802.11ac), Wi-Fi 4 (802.11n)
Download speed
600 MBits/s
450 MBits/s
Upload speed
150 MBits/s
150 MBits/s
Has USB Type-C
✔
-
USB version
2
2
Has NFC
✔
✔
SIM cards
2 SIM
1 SIM
Has a fingerprint scanner
✔
✔
Bluetooth version
5
4.1
Has a gyroscope
✔
✔
Has GPS
✔
✔
Has a compass
✔
✔
Supports Wi-Fi
✔
✔
Has a cellular module
✔
✔
Supports Galileo
✔
-
Has a heart rate monitor
-
✔
Has an infrared sensor
-
✔
Has an accelerometer
✔
✔
Body sar (eu)
1.59W/kg
-
Supports ant+
✔
✔
Head SAR (eu)
0.36W/kg
-
Is DLNA-certified
-
✔
Disclaimer! NFC, GSM network support, and some other specs can be different depending on the country.
Samsung Galaxy A51
Samsung Galaxy S6