idunno, not feelin either of them tbh the realism one is a nice try, but the light on the render is much harder and of a different color than the light on your bg, so that needs work, also dunno if the render fits the bg at all
yeah I do agree with dinges although the first one has a nice sense of depth. I think it is lacking effects. As for the second one the blurred c4d in front ruins it for me. I don't like this one as much.
I really like the realism one, very well done. The second one has good colors, but the depth is a little screwy in my opinion.