Cure, you're amazing. It's always a great deal to take in when you post more artwork, I tend to stare at it for quite a while.
I think the comment on the hair may be referring to Ah, where his hair is covering all of the top of his head, as opposed to Chu, who has hair only in minuscule areas.
Really I can't think of much else to say... I think I could learn more from this art than I could pick away details of it for a critique