Difference between SAMSUNG GALAXY M31S and OPPO A91 ?

	PRODUCT 1	PRODUCT 2
	SAMSUNG SAMSUNG GALAXY M31S	OPPO OPPO A91
VERSION
Announced	2020	2019
Release date	2020	2019
NETWORK
Technology
DEVICE
Dimensions
Weight		172 g
S.I.M.	Double SIM	Double SIM
Design	32MP	16MP
Other
SCREEN
langfront.Type
Size	6.5 inches	6.4 inches
Resolution	1080 x 2400 pixels	1080 x 2400 pixels
Protection	Gorilla Glass 3
PLATFORM
Operating system	Android 10,One UI 2.0,	Android 9.0 (Pie); ColorOS 6.1
Chipset	Exynos 9611 (10nm)	Mediatek MT6771V Helio P70 (12nm)
Processor	Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53)	Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
GPU	Mali-G72 MP3	Mali-G72 MP3
MEMORY
Card slot	microSDXC	microSD, jusqu`à 256 Go
Internal & RAM	128GB 6GB RAM or 128GB 8GB RAM	128GB 8GB RAM
CAMERA
Main	64 MP + 12 MP + 5 MP + 5 MP	48 MP + 8 MP + 2 MP + 2 MP
SOUND
Loudspeaker	✔️	✔️
Jack 3,5 mm	✔️	✔️
CONNECTIVITY
Wifi	✔️	✔️
Bluetooth	✔️	✔️
GPS	✔️	✔️
NFC	✔️
Radio	FM Radio,RDS,registration,	FM Radio
USB	2.0,Type-C 1.0,	2.0,Type-C 1.0,
CHARACTERISTICS
Sensors	Fingerprint (lateral),accelerometer,gyroscope,proximity,compass,	Fingerprint (under screen,optical),accelerometer,gyroscope,proximity,compass,
Various	25W Fast Battery Charging - Reverse Charge	30W fast battery charging
BATTERY
Type	6000 mAh	4025 mAh

What is the difference between SAMSUNG GALAXY M31S and OPPO A91 ?