Samsung Galaxy A31 vs Samsung Galaxy S9

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$250 VIEW ON AMAZON
$407 VIEW ON AMAZON

Display

Size

6.4 inches
5.8 inches

Resolution

2400 x 1080 pixels, 20:9 ratio,
411 PPI
2960 x 1440 pixels, 18.5:9 ratio,
568 PPI

Technology

Super AMOLED
Super AMOLED

Screen-to-body

84.88 %
84.36 %

Features

Ambient light sensor, Proximity sensor
HDR video support, Scratch-resistant glass (Corning Gorilla Glass 5), Ambient light sensor, Proximity sensor

Hardware & Performance

System chip

MediaTek Helio P65 MT6768
Qualcomm Snapdragon 845 SDM845

Processor

Octa-core, 2000 MHz, Arm Cortex-A75 and Arm Cortex-A55, 64-bit, 12 nm
Octa-core, 2800 MHz, Kryo 385, 64-bit, 10 nm

GPU

Mali-G52 MC2
Adreno 630

RAM

4GB LPDDR4
4GB LPDDR4

Internal storage

64GB
64GB

Storage expansion

microSDXC up to 512 GB
microSDXC up to 400 GB

OS

Android (10), Samsung One UI
Android (10, 9.0 Pie, 8.0 Oreo), Samsung One UI

Battery

Capacity

5000 mAh
3000 mAh

Type

Not user replaceable
Li - Ion, Not user replaceable

Charging

Fast charging
Qualcomm Quick Charge 2.0, Samsung Adaptive Fast Charging, Qi and Powermat wireless charging

Camera

Rear

Quad camera
Single camera

Main camera

48 MP (PDAF)
12 MP (OIS, PDAF)

Specifications

Aperture size: F2.0; Pixel size: 0.8 μm
Aperture size: F1.5/F2.4; Sensor size: 1/2.55"; Pixel size: 1.4 μm

Second camera

8 MP (Ultra-wide)
 

Specifications

Aperture size: F2.2
 

Third camera

5 MP (Macro)
 

Specifications

Aperture size: F2.4
 

Fourth camera

5 MP (Depth information)
 

Specifications

Aperture size: F2.4
 

Video recording

1920x1080 (Full HD)
3840x2160 (4K UHD) (60 fps), 1920x1080 (Full HD) (240 fps), 1280x720 (HD) (960 fps)

Features

 
HDR, Time-lapse video, Hyperlapse, Continuous autofocus, Object tracking, Picture-taking during video recording, Video calling, Video sharing

Front

20 MP
8 MP (Autofocus, HDR)

Design

Dimensions

6.27 x 2.88 x 0.34 inches (159.3 x 73.1 x 8.6 mm)
5.81 x 2.70 x 0.33 inches (147.7 x 68.7 x 8.5 mm)

Weight

6.53 oz (185 g)
the average is 6.4 oz (184 g)
5.75 oz (163 g)
the average is 6.4 oz (184 g)

Materials

Back: Plastic
Back: Glass (Corning Gorilla Glass 5); Frame: Aluminum

Resistance

 
Water, Dust; IP 68

Biometrics

In-screen fingerprint
Iris scanner, 2D Face unlock, Fingerprint (touch)

Features

 
Notification light

Colors

Prism Crush black, Prism Crush blue, Prism Crush red, Prism Crush white
Midnight black, Coral blue, Titanium gray, Lilac purple, Burgundy red, Sunrise gold, Ice blue

Cellular

LTE (FDD)

 
Bands 1(2100), 2(1900), 3(1800), 4(AWS-1), 5(850), 7(2600), 8(900), 12(700 a), 13(700 c), 14(700 PS), 17(700 b), 18(800 Lower), 19(800 Upper), 20(800 DD), 25(1900+), 26(850+), 28(700 APT), 29(700 d), 30(2300 WCS), 66(AWS-3), 71(600)

LTE (TDD)

 
Bands 38(2600), 39(1900+), 40(2300), 41(2600+), 46

UMTS

 
850, 900, 1700/2100, 1900, 2100 MHz

Data Speed

LTE-A, HSDPA+ (4G) 42.2 Mbit/s, HSUPA 5.76 Mbit/s
LTE-A Pro Cat 18 (1200/150 Mbit/s), HSDPA+ (4G) 42.2 Mbit/s, HSUPA

Dual SIM

Yes
 

SIM type

Nano SIM
Nano SIM

Multimedia

Headphones

 
3.5mm jack

Features

 
32-Bit DAC, aptX-HD

Connectivity & Features

Bluetooth

Yes
5.0

Wi-Fi

802.11 a, b, g, n, ac, dual-band; Wi-Fi Direct, Hotspot
802.11 a, b, g, n, ac, dual-band; MIMO, Wi-Fi Direct, Hotspot

USB

Type-C (reversible)
Type-C (reversible), USB 3.1

Features

Charging
Charging, OTG, Video out

Sensors

Accelerometer, Gyroscope, Compass
Accelerometer, Gyroscope, Compass, Hall (for flip covers), Barometer

Other

 
NFC, ANT+

Shopping information

MSRP

 
$ 720
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