I have a dozen of folders that are duplicates. Within them are a few dozen folders that are duplicates so i have a few thousand copies of the same files and folders. Many of them are exactly the same while others have changes in a few files.

What utility can i use to delete folders that are copies of others with no changes? if one or more files in that folder have been changed i dont want it deleted (and i'd like the subfolders to have a shortcuts to a copy but thats not required). Is there a utility to do this?