Most of my partners have been uncut and my man is cut. But I can't say I have noticed any problems with friction. Or any differences really that aren't to do with what he is doing (he's an awesome fuck

) rather than just his cock. I get very wet and stay that way for as long as we are fucking, lube is a good solution for friction generally.
By the way - where are you getting sore? Internally? Labia major? Labia minor? And what make you think it is the fact that he is cut and not something else?