Are you talking about modern apes? If so then I suppose someone who is not a palentologist
might mistake an ape an a human skull but I don't know.
The thing about these skulls though is that you can't put them definitivly into either category from a paleoanthropic perspective.
Creationists are very fond of putting samples that are closer to ape and closer to human in distinctive human and ape categories but then have trouble with the ones right near the middle of the gradient.
I would expect that under study the distinction between two ends of the gradient would be clear.