Seems like both AntiDupl & UniqueFiler have their bugs, AD finds a bunch of quasi-equal images (few pixels different for a 1280*1024 image) that UF didn't catch, while the exact same happens the other way around. :(

Wow, that's indeed a weird "duplicate"  :huh:
What i was meaning with "intuitive" is the layout of both images in UF, they're BIG enough to draw a conclusion, there's a right click option "Full Size" which gives us a dragable full sized comparison (most images these days are up and beyond 1024pixels),
the "details" section of the window in AD should not take up 80% imho, maybe we can all ask the author to make the actual decision screen show us more image instead of numbers & way too big and unclear icons. :D
It would be much neater assigning a function key to mark a file for deletion, and leave the screen for showing us what we need to see.

Oh my! This AntiDupl doesn't even come close to Unique Filer :(
Am I missing something or are you really forced to making a decision from looking at 2 thumbnails ?  :o