I am going with Jeff Green. He has more talent. He isn't as injury prone. I'd rather have a guy who is pretty good at everything, over the guy who is only good at defending, and does so from a size disadvantage.
I think green would be really good as a 4th best player on a contender. He could be a glue guy at that point. Play defense, score with his slashing, post game and 3 point range.
Bradley doesn't belong in the starting lineup on a contender. He is best suited as a defensive specialist on the bench, hitting some mid range shots, and doing so in limited minutes - under 25 a night.