As far as my consistency, I've been using the front image of the special box (if it has one), as it might be seen if it were unopened.
I know that the inside cover of the Wizard's edition of Ni No Kuni is actually different from the standard version (color vs b&w), so it gets kinda tricky. This sort of notation might also be something we can add in the "description" field for these items.
Have been using a shot of the contents as the "disc" image.
Anyway, I revived this thread because I submitted a scan of my Collector's Edition of Tales of Xillia, and it looks like the current images for the LE and CE do not accurately reflect what people got in the store. It looks like my copies, as well as the images I've seen from some of the others in the forum have the French superscript in the "Only on Playstation" bar.
My edit might've gotten rejected, so I just wanted to give a heads up.