>>264835383
Rift S is cheaper in build, higher res and RGB screen, has in-out tracking, and is the currently supported product. Rift has better tracking if you have room for the towers, lower res, more screen door, better build quality, and is no longer supported so if your wire is ever damaged/wears out then you will only get another by buying second hand, which you will likely have to do anyway if you want a Rift.

Also you'll need some decent earbugs for the Rift S as the sound is a bit shit.