Difference between VIVO NEX DUAL DISPLAY and ?

	PRODUCT 1	PRODUCT 2
	VIVO VIVO NEX DUAL DISPLAY
VERSION
Announced	2018
Release date	2018
NETWORK
Technology
DEVICE
Dimensions	157.2 x 75.3 x 8.1 mm
Weight	199 g
S.I.M.
Design	❌
Other
SCREEN
langfront.Type
Size	6.39 inches 1080 x 2340 p + 5.49 inches 1080 x 1920 p
Resolution
Protection

PLATFORM
Operating system	Android 9.0 (Pie)
Chipset	Qualcomm SDM845 Snapdragon 845 (10nm)
Processor	Octa-core (4x2.7 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver)
GPU	Adreno 630
MEMORY
Card slot	❌
Internal & RAM	128 GB, 10 GB RAM
CAMERA
Main	12 MP + 2 MP + TOF Camera (3D)
SOUND
Loudspeaker	✔️
Jack 3,5 mm	✔️
CONNECTIVITY
Wifi	✔️
Bluetooth	✔️
GPS	✔️
NFC
Radio	❌
USB	2.0,Type-C 1.0,
CHARACTERISTICS
Sensors	Fingerprint reader under the screen
Various	Charge rapide - accelerometer, gyro, proximity, compass
BATTERY
Type	3500 mAh

What is the difference between VIVO NEX DUAL DISPLAY and ?