CompareDir
Tool to Compare 2 directories and handle the files.
... directories.
Or click "Eq" = show file only the files that are the same.
Note the program cheqs FileName, FileSize, FileDate and (sub)directory. It does not compute md5 sums because that would make it extremely slow. Mind you i use this regular for directories with 2000 photos.
Based on Python, pygobject and gtk3.
+ Python-pillow if you want to compare 2 images.
No installation:
untar -xvzf CompareDir.tgz
where you want and run.