The first one's really cool, great colors and cool effects. Second one looks a bit more amateuristic, I don't know why.. I think the colors aren't as good as in the first one, and the render doesn't really blend in well.
Ok, I see what you see now. The arm doesn't blend as well as I thought it did. Thanks for commenting.
First one looks real nice, but i have a preferance for two, just work on blending that arm in and its golden.