Difference between "unrated" and "director's cut"

[skubrick]

I think 'unrated' is just a gimmick to get more teens or immature people to rent the movie. They'll throw in more blood or boobs or whatever. It's amazing how many movies come out now with UNRATED in huge bold letters on the front. It's ridiculous...shameless.

Director's cut is when a director wasn't able to cut it the way he/she wanted because the studio wanted a shorter version so it makes more money or whatever, and they recut it for the fans.