I'm going to go against the grain and pick Miller.
I think he's got a significant wrestling advantage and a decent striking advantage. Despite what happened in his fight with Nate Diaz, I think Miller also has decent submission defense and can stifle Lauzon on the ground. No doubt that his fight with Diaz also lit a fire under his ass too.
Either way I can't wait for this fight, I just hate that one of these guys will have to lose, barring a draw or no contest.