Is "Delete Duplicate" offered by iTunes Match different from simple deletion? After enabling iTunes Match, songs that are recognized as duplicates are marked with an icon: 



Clicking on this icon brings up a dialog offering to delete the duplicate:



Does "Delete Duplicate" do anything different from simply deleting the file in the usual way? In particular, since this approach does not support deletion of multiple files, can one simply select all files marked as duplicates and delete them to achive the same effect as clicking on these icons one by one?
Careful.  There seem to be issues as to what iTunes selects as a Duplicate. If you delete any files - make sure that you search the song first. You may be being asked to delete a higher quality version or your DRM-free version.

Don't delete any until they issue an update or more reviewers have spoken!!!