This is one of the most useful tools in DEVONthink. There is nothing similar to it anywhere in the mac world.
You have a bunch of files sharing the same or similar content, while they differ somehow, no app or tool exists to find out, except for this little tool. I have been using it forever.
But, the script is too aggressive. I wish someone with sufficient knowledge eof apple script can modernize it so that it can mark files as “similar” when they are >80% similar or something like that.