Advantage Romney. Romney is affable and this is a town hall format. Romney doesn’t have a terrible presidential record to defend. Momentum is with Romney. Obama will have to answer for his lies on Libya! Obama will have NOTHING to say about the last four years that will carry any weight.
When Obama inevitably says something like "well I realize I need to be president of all the people, including the 47% you write off" Romney ought to respond thusly: "You're right, Mr President. Whoever wins this will be president of all the people. That means the coal miners whose industry you said you wanted to bankrupt, the people struggling in the rust belt who you say cling to guns and religion because they're bitter, oil workers in the gulf without jobs because you refuse to allow licenses to be issued even though a judge ordered it, and catholic bishops and organizations that are suing you because you would force them to violate their conscience. Those people need a President too, and it's time they got one again."