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Compare Samsung Galaxy A51 VS Oppo A9 2020


Oppo A9 2020 packs with a 6.5" IPS display, Snapdragon 665 SoC, 4/8 GB RAM, 128 GB storage, 16 MP front camera, 48/8/2/2 MP quad rear camera, 5000 mAh battery, and 238 $ price.

While Samsung Galaxy A51 features with Exynos 7 Octa 9611 SoC, 4/6/8 GB RAM, 64/128 GB storage, 6.5" Super AMOLED display, 4000 mAh battery with 15 W fast charging, 48/12/5/5 MP quad rear camera and 32 MP front camera.


Here’s an in-depth specifications comparison between Oppo A9 2020 and Samsung Galaxy A51.

Jump to:
  1. Operating System  Comparison
  2. System  on  Chip (SOC)  Comparison
  3. RAM Comparison
  4. Storage  Comparison
  5. Display Comparison
  6. Launch Date Comparison
  7. Price  Comparison
  8. Sensors  Comparison
  9. Rear Camera Comparison
  10. Front Camera Comparison
  11. Tracking /  Positioning  Comparison
  12. Wi-Fi  Comparison
  13. Bluetooth  Comparison
  14. USB Comparison
  15. Connectivity  Comparison
  16. Audio File Formats /  Codecs Comparison
  17. Video File Formats /  Codecs Comparison
  18. Battery  Comparison
  19. Design  Comparison
  20. SIM Card  Comparison
  21. Networks  Comparison
  22. Mobile Network Technology and Bandwidth Comparison

Samsung Galaxy A51

Oppo A9 2020

Brand and Model   

Brand and Model

Brand 

Brand 

Samsung
  Oppo

Model 

Model

Galaxy A51
A9 2020

Galaxy A51 Operating System 

Oppo A9 2020 Operating System (OS)

Android 10
ColorOS 6.0.1 (Android 9.0 Pie)

User Interface (UI)

User Interface (UI)

 One UI 2.0

Galaxy A51 System on  Chip (SOC)    

Oppo A9 2020 System on  Chip (SOC)    

SOC 

SOC 

Samsung Exynos 7 Octa 9611
Qualcomm Snapdragon 665

Process Technology 

Process Technology 

 10 nm 
 11 nm 

CPU

CPU

4x 2.3 GHz ARM Cortex-A73
4x 2.2 GHz Kryo 260
4x 1.7 GHz ARM Cortex-A53
4x 1.8 GHz Kryo 260

CPU Bits 

CPU Bits 

 64 bits 
 64 bits 

Instruction Set  

Instruction Set  

 ARMv8-A
 ARMv8

CPU Frequency 

CPU Frequency 

 2300 MHz  
 2000 MHz  

CPU Cores 

CPU Cores 

 8
  8

GPU

GPU

ARM Mali-G72 MP3
Qualcomm Adreno 610

GPU Cores

 GPU Cores

3

Galaxy A51 RAM Capacity 

Oppo A9 2020 RAM Capacity 

4 GB
  4 GB
6 GB

 8 GB
   8 GB  

RAM Type  

RAM Type  

LPDDR4X
 LPDDR4X

RAM Channels  

RAM Channels  

Double channel
 Double Channel

RAM Frequency  

RAM Frequency  


 1866 MHz

Other Features 

Other Features


 Game Boost 2.0

Galaxy A51 Storage    

Oppo A9 2020 Storage

  64 GB 

   128 GB 
  128 GB

 UFS 2.1

Galaxy A51 Memory Cards 

Oppo A9 2020 Memory Cards

microSD
  microSD
microSDHC
 microSDHC
microSDXC
 microSDXC

Galaxy A51 Display    

Oppo A9 2020 Display    

Type / Technology 

Type / Technology 

Super AMOLED
IPS

Diagonal Size 

Diagonal Size 

 6.5 in 
  6.5 in 
 165.1 mm 
  165.1 mm 
 16.51 cm 
  16.51 cm 

Width 

Width 

  2.72 in 
  2.67 in 
  69.19 mm 
  67.75 mm 
  6.92 cm 
  6.78 cm 

Height 

Height 

  5.9 in 
  5.93 in 
 149.9 mm 
  150.56 mm 
  14.99 cm 
  15.06 cm 

Aspect Ratio 

Aspect Ratio 

 2.167:1
 2.222:1

Resolution 

Resolution 

 1080 x 2340 pixels 
 720 x 1600  pixels 

Pixel Density 

Pixel Density 

  396 ppi 
  270 ppi 
 155 ppcm 
  106 ppcm 

Color Depth 

Color Depth 

  24 bits  
  24 bits  
  16777216 colors 
  16777216 colors 

Display Area 

Display Area 

  89.19 % 
  82.74 % 

Other Features 

Other Features 

 Capacitive 
 Capacitive 
 Multi-touch 
 Multi-touch 
Scratch resistant


2.5D curved glass screen

in-cell

1500:1 contrast ratio 

 480 cd/m square brightness

Galaxy A51 Sensors    

Oppo A9 2020 Sensors

Proximity
 Proximity
Light
 Light
Accelerometer
 Accelerometer
Compass
 Compass
Gyroscope
Gyroscope
Fingerprint
  Fingerprint

 Geomagnetic
 In-display fingerprint sensor

Galaxy A51 Rear Camera    

Oppo A9 2020 Rear Camera 

Sensor Model

Sensor Model

 Samsung S5KGM2

Sensor type 

Sensor type 

ISOCELL
CMOS

Aperture

Aperture

f/2
 f/1.8

Flash Type

Flash Type

LED
Dual LED

 Image Resolution 

 Image Resolution 

 8000 x 6000 pixels 
 8000 x 6000  pixels 
 48 MP 
 48 MP 

Video resolution

Video resolution

1920 x 1080 pixels
 3840 x 2160 pixels
2.07 MP
 8.29 MP

Video FPS

Video FPS

30 fps
 30 fps

Features 

Features 

Autofocus 
Autofocus 
Continuous shooting 

Digital zoom
Digital zoom
 Digital image stabilization
 Digital image stabilization
Geotagging 
Geotagging 
Panorama 
Panorama 
HDR 
HDR 
Touch focus 
Touch focus 
Face detection
Face detection
White balance setting 
White balance setting 
ISO setting 
ISO setting 
Exposure compensation 
Exposure compensation 
Self-timer 
Self-timer 
Scene mode 
Scene mode 

 Night Mode
 Sensor size-1/2.25”
 Sensor size-1/2.25”
 Pixel size- 1.6 um (4-in-1 pixel binning)
Pixel size- 1.6 um (4-in-1 pixel binning)
 Sensor type- ISOCELL Plus

 Super Phase Detection
 Phase detection
 6-element lens
Ultra Night Light Mode 2.0
 PDAF

Secondary rear camera - 12 MP (ultra-wide)

Secondary rear camera- 8 MP (ultra-wide)


 Sensor size- 1/4” (#2)
Pixel size- 1.12 um (#2)
 Pixel size- 1.12 um (#2)

 5-element lens (#2)
 Aperture size - f/2.2 (#2)
 Aperture size- f/2.2 (#2)

Angle of view- 119 degree (#2) 

Third rear camera - 5 MP (depth-sensing)

Third rear camera- 2 MP depth-sensing)

Aperture size - f/1.12 (#3)
 Aperture size- f/2.4 (#3)

 Sensor size- 1/5” (#3)

 Pixel size- 1.75 um (#3)

Fourth Rear Camera-5 MP (Macro)

Fourth rear camera- 2 MP (macro)


 Sensor size- 1/5” (#4)

 Pixel size- 1.75 um (#4)
  Aperture size- f/2.4 (#4)
 Aperture- f/2.4 (#4)

Galaxy A51 Front Camera

Oppo A9 2020 Front Camera    

Sensor Model
 Sensor Model
 Samsung S5KGD1
Samsung S5K3P8 
Sensor Type
Sensor Type

ISOCELL

ISOCELL

Aperture
Aperture
f/2.2
 f/2

Image Resolution 

Image Resolution 

6560 x 4928 pixels
 4640 x 3488 pixels 
32.33 MP
  16.18 MP 

Video Resolution

Video Resolution

1920 x 1080 pixels
 1920 x 1080 pixels
2.07 MP
 2.07 MP

Video FPS

Video FPS

30 fps
 30 fps

Features 

Features 

 Sensor size-1/2.8”
Sensor size- 1/3.1” 
 Pixel size- 0.8 um
Pixel size- 1.0 um
 Sensor type- ISOCELL

 Face unlock
Face unlock 

Galaxy A51 Audio 

Oppo A9 2020 Audio

Loudspeaker 
Loudspeaker 
Earpiece
Earpiece

Stereo speakers

Dolby Atmos

Galaxy A51 Radio    

Oppo A9 2020 Radio

Yes
  Yes

Galaxy A51 Tracking /  Positioning 

Oppo A9 2020 Tracking /  Positioning

GPS
 GPS 
A-GPS
 A-GPS 
GLONASS
GLONASS
BeiDou
BeiDou
Galileo 
Galileo

Galaxy A51 Wi-Fi    

Oppo A9 2020 Wi-Fi    

802.11a (IEEE 802.11a-1999)
 802.11a (IEEE 802.11a-1999)
802.11b (IEEE 802.11b-1999)
 802.11b (IEEE 802.11b-1999)
802.11g (IEEE 802.11g-1999)
802.11g (IEEE 802.11g-2003)
802.11n (IEEE 802.11n-2003) 
802.11n (IEEE 802.11n-2009) 
802.11n 5GHz
 802.11n 5GHz
802.11ac (IEEE 802.11ac)
 802.11 ac (IEEE 802.11ac)
Dual band
Dual band
 Wi-Fi Hotspot 
 Wi-Fi Hotspot 
Wi-Fi Direct
 Wi-Fi Direct
 Wi-Fi Display
 Wi-Fi Display

Galaxy A51 Bluetooth  

Oppo A9 2020 Bluetooth

Version 

Version 

 5.0
 5.0

Features 

Features 

A2DP 
A2DP 
AVRCP

DIP

HFP

HID

HSP


 LE
MAP

OPP

PAN

PBAP/PAB

HOGP

Galaxy A51 USB 

Oppo A9 2020 USB

Connector Type  

Connector Type  

USB Type-C
Micro USB

Version 

Version 

 2.0
  2.0

Features 

Features 

Charging 
Charging 
Mass Storage 
Mass Storage 
On-The-Go
On-The-Go

Galaxy A51 Headphone Jack 

Oppo A9 2020 Headphone Jack

Yes
 Yes

Galaxy A51 Connectivity 

Oppo A9 2020 Connectivity

 Computer sync 
 Computer sync 
 OTA sync 
 OTA sync 
Tethering
 Tethering
 VoLTE
 VoLTE
ANT+

Galaxy A51 Browser    

Oppo A9 2020 Browser

HTML 
HTML 
HTML5 
HTML5 
CSS 3 
CSS 3 

   Galaxy A51 Audio File Formats /  Codecs    

Oppo A9 2020 Audio File Formats /  Codecs    

AAC 
AAC 

AAC+ / aaPlus / HE-AAC v1
AMR / AMR-NB / GSM-AMR 
AMR / AMR-NB / GSM-AMR 
AMR-WB
 AMR-WB
eAAC+ / aacPlus v2 / HE-AAC v2
eAAC+ / aacPlus v2 / HE-AAC v2
FLAC 
FLAC 
M4A

MIDI 
MIDI 

MP3 
OGG 
OGG 
WMA 
WMA 
WAV 
WAV 

LDAC

Galaxy A51 Video File Formats /  Codecs    

Oppo A9 2020 Video File Formats /  Codecs    

3GPP 
3GPP 
3GPP2

AVI 
AVI 
DivX
DivX
Flash Video

H.263
 H.263
H.264 / MPEG-4 Part 10 / AVC video
 H.264 / MPEG-4 Part 10 / AVC video
H.265 / MPEG-H Part 2 / HEVC
 H.265 / MPEG-H Part 2 / HEVC
MP4
MP4 
MKV
MKV
VC-1
 VC-1
VP8

VP9

WebM

WMV

WMV7

WMV8

Xvid
Xvid

Galaxy A51 Battery    

Oppo A9 2020 Battery

Capacity

Capacity

4000 mAh
5000 mAh

Type 

Type 

Li-Polymer
 Li-Polymer

Features 

Features 

Non-removable 
 Non-removable 
Fast charging
 Fast charging

 Wireless charging

 HD video playback- up to 11hrs

Charger Output Power

 Charger Output Power

 5 V / 2 A

 9 V / 1.67 A

Launch   

Oppo A9 2020 Launch

Announced 

Announced 

 2019, 13th December
 2019, Sept.

Status 

Status 

Release December 2019
 Release Sept. 2019

Galaxy A51 Price   

Oppo A9 2020 Price

-
 4 GB + 128 GB = 238 $

 8 GB + 128 GB = 280 $

Galaxy A51 Design    

Oppo A9 2020 Design    

Colors 

Colors 

Prism Crush Black
Space Purple
Prism Crush Blue
Marine Green
Prism Crush Pink

Prism Crush White

Width 

Width 

 73.6 mm 
  75.6 mm 
  7.36 cm 
  7.56 cm 
 0.24 ft 
  0.25 ft 
  2.9 in 
  2.98 in 

Height 

Height 

158.5 mm 
 163.6 mm 
15.85 cm 
 16.36 cm 
 0.52 ft 
  0.54 ft 
  6.24 in 
  6.44 in 

Thickness 

Thickness 

 7.9 mm 
  9.1 mm 
  0.79 cm 
  0.91 cm 
 0.03 ft 
  0.03 ft 
  0.31 in 
  0.36 in 

Weight 

Weight 

 172 g
  195 g
 0.38 lbs
   0.43 lbs
 6.07 oz
  6.88 oz

Volume 

Volume 

 92.16 cm3
 112.55 cm3
  5.6 in3
 6.84 in3

Body Materials

Body Materials

Plastic
Plastic

Galaxy A51 SIM Card    

Oppo A9 2020 SIM Card

SIM Card Type  

SIM Card Type  

Nano-SIM (4FF-fourth form factor, since 2012, 12.30 x 8.80 x 0.67 mm) 
Nano-SIM (4FF-fourth form factor, since 2012, 12.30 x 8.80 x 0.67 mm) 

Number of SIM Cards 

Number of SIM Cards 

  2
  2

Features

Features

Dual SIM stand-by
 Dual SIM stand-by

Galaxy A51 Mobile Network Technology and Bandwidth   

Oppo A9 2020 Mobile Network Technology and Bandwidth   

 UMTS (384 kbit/s) 
 UMTS (384 kbit/s) 
 EDGE 
 EDGE 
 GPRS  
 GPRS  
 HSPA+ 
 HSPA+ 
LTE Cat 12 (102.0 Mbit/s, 603.0 Mbit/s)
LTE Cat 12 (102.0 Mbit/s, 603.0 Mbit/s)

Galaxy A51 Networks    

Oppo A9 2020 Networks    

GSM

GSM

GSM 850 MHz (B5)
GSM 850 MHz (B5)
GSM 900 MHz (B8)
GSM 900 MHz (B8)
GSM 1800 MHz (B3)
GSM 1800 MHz (B3)
GSM 1900 MHz (B2)
GSM 1900 MHz (B2)

UMTS

W-CDMA

UMTS 850 MHz (B5)
W-CDMA 850 MHz (B5)
UMTS 900 MHz (B8)
W-CDMA 900 MHz (B8)

UMTS 1900 MHz (B2)

 

UMTS 2100 MHz (B1)
 W-CDMA 2100 MHz (B1)

LTE

 LTE

LTE-FDD 850 MHz (B5)
LTE-FDD 850 MHz (B5)
LTE-FDD 900 MHz (B8)
LTE-FDD 900 MHz (B8)
LTE-FDD 1800 MHz (B3)
LTE-FDD 1800 MHz (B3)
LTE-FDD 2100 MHz (B1)
LTE-FDD 2100 MHz (B1)
 LTE-FDD 2600 MHz (B7)


LTE-TDD 2300 MHz (B40)

LTE-TDD 2500 MHz (B41)

LTE-TDD 2600 MHz (B38)

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