Aie mix!
Poor stupid old Mac here (a one-man-band alas), whom life has surprisingly succeeded in teaching the difference between between
duplicate and
similar.
I really think you should let Google know that their reverse image search doesn't work
-
https://support.google.com/images/answer/1325808?hl=en
As for your lack of success with VisiPics and dupeGuru Picture Edition (not dupeGuru
tout court); all that I can say is that happily, your disappointing experience is not mine (nor that of most users).
These scorned "toys" (sniff!), while imperfect, sure beat going through a bunch of large folders by eye, as OFSO may have found.
Anyway, I promise not to "chase" you anymore, and am able to reassure you that the only juices that I am currently stewing in is an excellent glass of Cederberg David Nieuwoudt Ghost Corner Semillon of 2011 which is making me very happy.
Mac
