Just as 'Find ... Duplicates' is very helpful, its opposite, UNIQ, would be too.
you've got a list of files...
sorted by... doesn't matter, name
in the list you've got multiple drives (drive letters)
some of the drives are backups &/or dups of various others
so with that, you're apt to have dups...
you've got a list of files...
you don't necessarily want to exclude an entires drive (or directory tree)
- as the drives may not necessarily be mirrors, only that they /may/ happen
- to have dups
given that, say you're sorted by Name
c:/red train.mp3
c:/red train 2.mp3
z:/red train.mp3
z:/red train Z.mp3
- 'Find UNIQ names'
c:/red train.mp3
c:/red train 2.mp3
z:/red train Z.mp3
IOW, you're left with a set of uniq file names
after that, you might then do a 'Find Size Duplicates' based on Size
& that may point out that train2 & trainZ are the same size
which might make you investigate... given similar name & size
& you might find you've got an actual dup there, with just diff name...
or you could drag that set of uniq's into, GridPlayer
to visually look for dups...
or
sizedupe:
then, UNIQ name
might point out dupe: with differing name
- the UNIQ part would cut out, very quickly, a lot of "noise"
or
all kinds of situations where this would be very helpful.
(Earlier thread, No Dupes in Search Results.)
(I guess I also have to see what distinct: does.
Though right-click a column, like you do with Find...Duplicates, would be much easier.
And at the least, perhaps a synonym uniq: for distinct: [which is rather hard to say & spell & type

Also a right-click a column method would not "dirty up" History.)