Compare revisions - When the resource is a file the action compares the two selected revisions using the Compare view. When the resource is a folder the action displays the set of all resources from that folder that were changed between the two revision numbers.

Revert changes from these revisions - Similar to the svn-merge command, it merges two selected revisions into the working copy resource. This action is only enabled when the resource history was requested for a working copy item.