Goblin and Troll Skulls

I've had this as a sketch for freakin' ever..
Comparative anatomy time with humanity's least favorite relatives.
Interesting notes to point out:
-Goblins have freakin' big eyes to see in the dark, whereas Trolls just have tiny eyes and crappy vision in general
-Goblins have a tiny wee nose to avoid injury, Trolls have big giant tall noses to help with tracking by scent
-Trolls have a sagittal crest while Goblins have a unique sagittal cleft. Occipital crests are pronounced in both cases but not really visible here (that means that bony ridge on the back)
-Trolls have the same basic dentition as humans but Goblins have one fewer carnassial per quadrant (i ran out of space)
-Goblins have horns. Isn't that weird?