Can Koofr find identical files with different names?

Yes, Koofr can identify identical files even if they have different names.

The Duplicate File Finder compares the hashes and sizes of your files, not their names, dates, or extensions. If you upload the exact same photo, video, or document multiple times under different names, Duplicate File Finder will recognize that the files have the same content, group them together, and let you decide if you want to delete the extra copies.