Dude the topo is certainly getting there, you need to lose the loops in both areas where I suggested before...theres too much.

Also my trusty red pen has come out today to draw for you a skull so you can see the shape that the head needs to be. The skull is not round its almost a flat shape at the top that rise toward the back slightly.

I know translating from photos is difficult but I think a little more understanding of the anatomical side of things will greatly improve the head...

keep at it though!!

Jay