Cmon...

1. How are bigger skulls showing any difference?
2. There is a tribe that does this artificially and skulls can be molded after death to whatever shape you wish.
3. Neanderthals are a myth. Still looking for the missing link? Just the narrative that wants to convince you that you evolved to become a human - still no proof has been found.

Bottom line - strange skulls exist. Any correlation to actual difference in skulls making a difference mentally, physically, etc. - None. I understand that it is an interesting thought and perhaps holds some secret information that I am missing. But that is hardly a different race of people or someone with more potential than a regular human. Still, if you have any arguments, I would like to hear them.