You are probably right. lol!
I never sex based on just the head. My male pugets head looks like a female in a close up.
But I thought I would throw a guess out there anyway! For all we know. They are all females.
I've never tried to sex by the head, but here goes:
In my opinion all the snakes in both sets are female. Both pugets look female to me as well as all the second set, though the first is very young looking. (Watch that one be male).