To my knowledge, a sun roof is a thing like they have on most limo's where you can push a button and open it up and stick your head out the top and let the wind come in etc. A moon roof is just a dark tinted window in your roof that doesn't retract, its just there for a reason. I think I'm right.. Not sure.
Sunroof - electric sliding roof that is metal and looks like your roof and slides open to let the sun shine in.
Moonroof...glass piece that slides and gives you the option to view the moon and stars when driving. Be careful though. Keep your eyes on the road..