Crit coming through~
Your male one came out really great.

The female one is a bit off, however.
For the most part, to someone that hasn't seen much of you art, the male and female look nearly identical except for the fact that the female's jaw seems a bit more squished into her head. Drawing them is very similar to the male, except that the jaw is more slender and is a more delicate curve that reaches to the bottom of the ear. (Somewhat. ^^;)
It's very hard to explain by word. I'm having a difficult time formulating the idea in my head, but I can see it visually. XD
Another thing that's bothering me quite a bit on both of them is the ear. The top of the ear should reach the eyes in height. Take a look in a mirror and you'll see what I mean. :3
The neck, especially on the girl, looks a little long. ^^;
Over all, though, very nice.

These were just some things that I noticed. If you're ever feeling lost, just grab a mirror. It seriously does wonders. :3
I hope that this wasn't too harsh. If you have any questions, feel free to ask via PM. ^^ Good luck to you.