The way this stands, I wasn't a fan of any of the three in particular. I would never approach a render like that myself, much less throw it out for a battle. But we all know moments has got guts. I'd love moments' tag if he took out the render, but to be honest the two things don't go well, so in terms of composition it's weak. But seriously dude, take out that render and you've got a pretty cool piece.
Brane's is actually pretty cool, but pretty empty and I can see a lot less put into it compared to moments'. The face also has an annoying bit of texture over at it which takes away from the focal point.
Renyui's is the weakest. The abstract here doesn't bode well for me. Not a great use of the render. Though probably the most artistic, it does not really have the essence a tag should have, such as a focal point.
So for a pretty appealing background, moments gets my vote, not by much, brane's just actually lacks a background, it had potential however, and I think if it was more completed it would be the winner for me.