Ok, right off the bat I like the second design a lot more. The first one took me too long to realize what was going on in the picture, when I am looking at a shirt, I need to know right away what's on it or I'm not going to bother wasting my time figuiring it out.
Now notice I said right off the bat, I need to know more about what you are doing for this shirt design. Is it going to be on the front or back? How large is it going to be? where exactly on the shirt will it go on? what color will the shirt be? what type face are you going to use for your text? What size and color will the type be?
However, most importantly, I need to know what the statement is that you are going for with this shirt? I honestly can't tell what you are going for, as far as theme, purpose, or statement by just looking at your design. I realize you have yet to add the text, but just keep that in mind.
Update us whenever you can.
"You are not special. You are not a beautiful or unique snowflake. You are the same decaying organic matter as everything else." - Tyler Durden