I invite you to try Poda. I made this to find similar directories among multiple storage locations (or hampers as I call them in the program). The typical use case is to find out whether I find whether I have duplicate or similar directories in my laptop, the other laptop, NAS, flash drives, etc. I may have made a backup of a flash drive on my laptop and not sure what has changed where. Or even within the same storage!
[Update: There was a mistake in the use of dirdupes.py below. A sort filter was missing. It is now corrected.]
The way it works is that you first get the index of each hamper. For example, you may have four hampers:
