Difference between VIVO Y91 and OPPO A91 ?

	PRODUCT 1	PRODUCT 2
	VIVO VIVO Y91	OPPO OPPO A91
VERSION
Announced	2019	2019
Release date	2019	2019
NETWORK
Technology
DEVICE
Dimensions	155.1 x 75.1 x 8.3 mm
Weight	163.5 g	172 g
S.I.M.	Duel	Double SIM
Design	1080p@30fps	16MP
Other
SCREEN
langfront.Type
Size	6.22 inches - 720 x 1520 pixels	6.4 inches
Resolution		1080 x 2400 pixels
Protection

PLATFORM
Operating system	Android 8.1 (Oreo)	Android 9.0 (Pie); ColorOS 6.1
Chipset	Mediatek MT6762 Helio P22 (12nm)	Mediatek MT6771V Helio P70 (12nm)
Processor	Octa-core 2.0 GHz Cortex-A53	Octa-core (4x2.1 GHz Cortex-A73 & 4x2.0 GHz Cortex-A53)
GPU	PowerVR GE8320	Mali-G72 MP3
MEMORY
Card slot	microSD, up to 256 GB	microSD, jusqu`à 256 Go
Internal & RAM	64 GB, 3 GB RAM	128GB 8GB RAM
CAMERA
Main	13 MP + 2 MP - Selfie 8 MP	48 MP + 8 MP + 2 MP + 2 MP
SOUND
Loudspeaker	✔️	✔️
Jack 3,5 mm	✔️	✔️
CONNECTIVITY
Wifi	✔️	✔️
Bluetooth	✔️	✔️
GPS	✔️	✔️
NFC
Radio	FM radio	FM Radio
USB	microUSB 2.0	2.0,Type-C 1.0,
CHARACTERISTICS
Sensors	Fingerprint reader	Fingerprint (under screen,optical),accelerometer,gyroscope,proximity,compass,
Various	accelerometer,proximity,compass,	30W fast battery charging
BATTERY
Type	4030 mAh	4025 mAh

What is the difference between VIVO Y91 and OPPO A91 ?