Oops. Didn't read the key last line in your post:
Is there a tool for comparing folder contents and tell me if the files are identical and sort all the unique files into one folder.
I don't *think* either LookDisk or DoubleKiller Pro will do this... Be a killer feature, though! Keep your eyes on XYplorer
, come to think of it (note the link is to the road map for the developmental future - finding dupes is pretty far down the list...). The developer is working on adding a duplicate file finding feature to it and, as it is a file manager that is built on a search engine, he might be willing to consider adding this capability in.