Your problem is the curve in the face near the eye socket, the kissy face only needs slight altercation, but the curve you made is too gradual and the eye socket is too low. You need to deepen the curve, and move it up just the slightest bit.
You usually color things great, so I won't give you any coloring tips, I'm sure you will do better than anything I can suggest.
The contrast in the faces is AMAZING! Like, really good! Keep it up, and STOP DEGRADING YOUR OWN WORK! It's really really good and you need to stop being so hard no yourself.