The two US versions differ a lot: in the Unrated version there are missing scenes which are contained in the PG-13 version. The other way around, the Unrated version contains scenes which are missing in the PG-13 version. Surprisingly the PG-13 version is longer in total than the Unrated version. Moreover there are almost no new explicit scenes in the Unrated version.
The German Version does contain some more scenes during the end credits and again one can find a detailed comparison here.
