How fast can you go in awd?

I have a friend who has a stock 350 raptor and he seems to think its faster than the 570 lol. That being said I know the 570 isnt a race bike or anything but I know its faster than that bike in AWD or not. I was wondering can I lunch the bike in AWD all the way to top speed? I know some other 4×4 bikes say not to pass a certain speed when the 4×4 is on.