Photo Sorter has been updated to handle some duplicates I've been developing in Google Photos. These are pretty specific rules but might be helpful if you are trying to maintain a local archive from Google Photos via Google Takeout. You can get the latest binary and source from github (or fork away if it's not quite what you need).
The first change is that Photo Sorter now checks for duplicates in the source folder as well as the destination. If two source files have the same date taken and the same filename then the larger file is chosen as the winner and the smaller file is deleted. The filename check ignores anything in parentheses, so 123.jpg is considered to be the same filename as 123(1).jpg. This helps alleviate a fun bug where Google Photos will export via the API a different file that was originally uploaded. I've stopped using the Google Photos API for this reason, and because it will under no circumstances allow you to download a video that is the same quality as the original upload. Crazy edge case Google. Happily Google Takeout still works so I'm stuck doing it slowly and wastefully.
The second change is that if a source duplicate is found using the rules above then it will also be deleted from the destination folder (in order to be replaced by the presumed better version of itself).
Photo Sorter copies some folder full of photos and movies to a different folder with a clean structure and some de-duplication. It's been keeping me sane since 2018. Full instructions here.