The one with the broken button looks unfinished to me -- sort of like a poor self-publishing cover. (I'm not sure why...)
The one with an empty coat does look more professional, but I'm not sure why. The broken button does imply some kind of mystery or violence.
The one with the coat would be the one I'd pick up to look at in a bookstore.
I like the broken button. The other one seems a bit too literal--though I like the empty shoes with it--and the button break is intriguing.
I think if you combined the type of the first one and the image of the second, that might be the winner for me.
I like the coat one.

Question: Does Ruby in Point Last Scene have Asperger's?