When copying multiple files between directories at the same time, using dolphin for example, there are 3 types of file conflicts: exact copies, exact at the start, end and middle, and different files.
When selecting “apply to all” and then choosing an action, for example overwrite, the overwrite function will apply to all 3 types of conflicts.
I believe that having a separate button to apply this action only to that specific type of conflict could be much more helpful. This could allow, for example, to skip same files and overwrite different ones.
This could be further improved with choices depending on file age, last time accessed, etc, but I think that just the first part by itself could be of much help.