Difference between VIVO Z3X and ZTE NUBIA Z20 ? in United States

	PRODUCT 1	PRODUCT 2
	VIVO VIVO Z3X	ZTE ZTE NUBIA Z20
VERSION
Announced	2019	2019
Release date	2019	2019
NETWORK
Technology
DEVICE
Dimensions	154.8 x 75 x 7.9 mm	158.6 x 75.2 x 9.2 mm
Weight	150 g	186 g
S.I.M.		Double SIM
Design	16MP	Uses main cameras
Other		Secondary screen (rear): AMOLED,5,1 inch,1080 x 2340 pixels,
SCREEN
langfront.Type
Size	6.26 inches	6.42 inches
Resolution	1080 x 2280 pixels	1080 x 2340 pixels
Protection		Corning Gorilla Glass

PLATFORM
Operating system	Android 9.0 (Pie)	Android 9.0 (Pie); Nubia UI 7
Chipset	Qualcomm SDM660 Snapdragon 660 (14nm)	Qualcomm SDM855 Snapdragon 855+ (7nm)
Processor	Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)	Octa-core (1x2.96 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485)
GPU	Adreno 512	Adreno 640 (700 MHz)
MEMORY
Card slot	64 GB, 4 GB RAM	❌
Internal & RAM		128GB 6GB RAM, 128GB 8GB RAM, 512GB 8GB RAM
CAMERA
Main	13 MP + 2 MP	48 MP + 8 MP + 16 MP
SOUND
Loudspeaker		✔️
Jack 3,5 mm		❌
CONNECTIVITY
Wifi	✔️	✔️
Bluetooth	✔️	✔️
GPS	✔️	✔️
NFC
Radio	FM Radio	❌
USB	microUSB 2.0	Type-C 1.0
CHARACTERISTICS
Sensors	Fingerprint reader	Dual fingerprint (side mounted),accelerometer,gyroscope,proximity,compass,
Various		27W fast battery charging
BATTERY
Type	3260 mAh	4000 mAh

What is the difference between VIVO Z3X and ZTE NUBIA Z20 in United States?