according to a new chinese article, the spec sheet lists the camera as the S5K2L7. also used by the meizu note 6.
and the front camera is the OV13855, used in many redmi note 4/x's primary camera.
I dont know about the samsung sensor but the front camera is a definite downgrade from the indian variant.
The good news is that the chinese variant is running on android 8.1.0, the codename is still WHYRED so flashing the indian ROM should work and we dont have to wait for another global rom release.
http://www.igao7.com/news/201803/MgVcAW7qCIk3it9E.html
The price of the 3/32 note 5 makes redmi 5 plus such a bad buy.