Before and after meme

Well, it's not the same piece... but the same subject. The old est drawing is on the top. What do you think? Have I improved? (Note: the first one is from January 2012, the other ones from Julay 2012). I have also added some close ups so you can tell me in which way I have improved/or not. Any kind of feedback is appreciated .
The drawings:
First: [link]
Second: [link]
Third: [link]

The blank meme: [link]