Board Thread:General Discussion/@comment-3146930-20130825201030/@comment-4957813-20130825201744

Rollbacks are generally more powerful. When you rollback, it only appears in the Recent Changes menu, which not a lot of vandals go by, and if a person makes  a string of edits, rolling back that edit will put the page into when it was before that user started editing it. Generally, they're the first line of defense against vandals.