Dave a lateral picture would be best, it will show the concave or flatness of the skull running from forehead to nose, it will also show the the difference of the zygomatic arch. Unfortunately you will not be able to see the difference in the post orbital process as thus appears to be where the skull has broken off a bit
I'd have to agree with you on everything you said there Leon er yes, yes er..... zygomatic arch.... and erm post orbital process....yes exactly what I'd have said.