This just become timely for me when I spotted the guys from the cover of my second book on the cover of an upcoming December release in the same genre though different publisher. (Well obviously in the same genre. Pictures of guys kissing only tend to show up on m/m romances.
)
The base image of the two guys is the same, but the covers are very different, the picture is cropped differently, it's flipped, one guy has different hair, the colour theme is different, the details are different. If it hadn't been
my cover, but had just been of a book I'd read I probably wouldn't even have spotted it (and I remember covers very well) but of course I've looked at my cover a lot.
It interested me a lot that the cover artists could take the same picture and create such distinct covers from them.
(see
my blog post from 13th November to see them side by side if you like.)