Difference between ZTE NUBIA Z20 and OPPO A8 ?

	PRODUCT 1	PRODUCT 2
	ZTE ZTE NUBIA Z20	OPPO OPPO A8
VERSION
Announced	2019	2019
Release date	2019	2019
NETWORK
Technology
DEVICE
Dimensions	158.6 x 75.2 x 9.2 mm	163.9 x 75.5 x 8.3 mm
Weight	186 g	180 g
S.I.M.	Double SIM	Double SIM
Design	Uses main cameras	8 MP
Other	Secondary screen (rear): AMOLED,5,1 inch,1080 x 2340 pixels,
SCREEN
langfront.Type
Size	6.42 inches	6.5 inches
Resolution	1080 x 2340 pixels	720 x 1600 pixels
Protection	Corning Gorilla Glass
PLATFORM
Operating system	Android 9.0 (Pie); Nubia UI 7	Android 9.0 (Pie); ColorOS 6.1
Chipset	Qualcomm SDM855 Snapdragon 855+ (7nm)	Mediatek MT6765 Helio P35 (12nm)
Processor	Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)	Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53)
GPU	Adreno 640 (700 MHz)	PowerVR GE8320
MEMORY
Card slot	❌	microSD, jusqu`à 256 Go
Internal & RAM	128GB 6GB RAM, 128GB 8GB RAM, 512GB 8GB RAM	128GB 4GB RAM
CAMERA
Main	48 MP + 8 MP + 16 MP	12 MP + 2 MP + 2 MP
SOUND
Loudspeaker	✔️	✔️
Jack 3,5 mm	❌	✔️
CONNECTIVITY
Wifi	✔️	✔️
Bluetooth	✔️	✔️
GPS	✔️	✔️
NFC
Radio	❌	FM Radio
USB	Type-C 1.0	✔️
CHARACTERISTICS
Sensors	Dual fingerprint (side mounted),accelerometer,gyroscope,proximity,compass,	Fingerprint (rear mounted),accelerometer,proximity,compass,
Various	27W fast battery charging
BATTERY
Type	4000 mAh	4230 mAh

What is the difference between ZTE NUBIA Z20 and OPPO A8 ?