sunroof- when the glass is slid back but remains outside the car and can be seen sticking out from the top of the car (like our cars)
moon roof- slides inside the frame work of the cars body, so that they're is no protruding glass when its open...
that may be true...i always though it was like this though:
sunroof: glass pops up, but does not go back
moonroof: glass pops up and rolls back.
thats just the way i learned it and the way people use those terms over here.