I actually prefer the Feral heart one.
Maybe it's because I'm more used to the Feral models? But just something about the Aro'Kai style which i'm not too sure about. Sure it looks more realistic. But I guess i'd prefer Feral heart because it has it's completely own style. Whilst Aro'kai is just realistic looking.
Plus, the ears look a little strange. [I know I couldn't do any better but.]