Extent of duplicate deletion with automatic deletion

If I select “Remove all duplicates automatically,” will it compare all fields before deleting? For example, I have 2 copies of Helene Hanff’s 84 Charing Cross Road from different publishers and with different publication dates. Will it keep both? Or will it note that the author and title are the same and delete one of them? Thank you!

It looks at the added date/time, and it keeps the book with the “oldest add date/time”

You can see this in the warning when you click the “Remove all duplicates automatically:”

Top left of this screen you could also opt to “find duplicates based on ISBNs” ! maybe that is useful?