No to both options.
If you want to delete the files later anyway, without the check whether the files are really duplicates or just poorly tagged (as they are in fact the live version, the dub, the remix etc), you could do 2 runs to rename the files:
First rename them with
(2 trailing underscores)
Then rename them again, this time without the trailing underscores. All the alleged duplicates will be left over with those trailing underscores which could easily be filtered with
%_filename% HAS __
and then be deleted/moved to a different location.