How would you know which file to keep? The renamed one or the one with the track number? And if there are more than 1 of these files with e.g. different track numbers - how would you determine which of these files would be the best?
Here is a longer discussion on the topic how to deal with alleged duplicates:
I think that the critierion that ARTIST and TITLE are the same is probably not sufficiant as this would assume that the data is absoluletely correct. But even then you could have the original version, the one from the Greatest Hits album, the anthology. This does not even consider that data is missing from the tag fields like "live", or "remix" or a version that popped up years later.
So I think that eliminating the duplicates actually requires
If an option to remember the user input should be implemented I would favour one only for "Skip all" but not as confirmation to overwrite existing files.