The original honda navigation system with back cam has following pros and cons
Pros
Very good quality back cam
Doesnt lag
Fits beautifully
Radio aux usb work very well
Cons
Bluetooth connection sometimes shows error
Google maps dont work very well but sometimes they do
Slow when playing youtube and soundcloud
Navigation app of tracking world is not as good as google maps
Ive been using it for about 8 months and these are my opinions about it. Honda city 1.5 aspire pt 2018
Chinese one has larger display and the one with 2gb ram will obviously launch google maps in a better way than stock
So its totally your choice what you want from a display unit.
If using navigation and google maps is your main priority dont go for honda unit