I have bought photons on accident.
Also lfs get confused with the difference
I have both photons and onyx percs
There are differences
Look also at the high dorsal on the photons
Percs have a lower dorsal
Also photons and onyx percs can share that orange eye so it's not the only criteria
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Yes, as the pictures above demonstrate, orange eyes are not a reliable tell that these are not photons. Though a true percula never has black eyes.
The same goes for the white fin outline - its absence is not a definitive tell, its presence on the other hand is.
Such a large amount of black could point to Photons or captive-bred Onyx percula. With wild percula, it is rather rare.
All reason why I wouldn't touch any captive-bred percula or ocellaris with 10ft pole unless I know the breeder and the parents are wild-caught.