If this was strictly an intellectual boxing match, Biden would be knocked out early in the first round. But it's not. Biden does have a lot more experience in public speaking and he is much better at conveying that he is just a regular guy with a lot of passion.
For all the talk about Biden's foreign policy cred, he voted against the first Iraq War - voted FOR the second one - and proposed cutting Iraq up into three parts. You would be hard pressed to find one item on which Biden could claim success on. He has experience - he does not have accomplishments.
Ryan is smart, fit and can speak right to you. He does NOT have the natural ability to distill ideas into short memorable phrases. He DOES know Romney's tax plans - he's the author. Biden would be smart to stay away from it.
I think one of the things that hurt Obama is precisely something I predicted - he sucks when he's mad, and the debate got him plenty mad. But I think what got his nerves is similar to what I had said - he is just not used to an environment where people don't fawn all over him. It's damned uncomfortable for him. He wasn't used to being told he's wrong - and convincingly.
Biden doesn't seem to have that failing. He's USED to being wrong. He's been making verbal gaffes since the '88 campaign. You can't beat him just by getting him pissed off. It won't work. He won't fall for it - he has a thick skin.
What WILL work is, Biden is - just like Obama - used to having other people do his thinking for him, and using that information. (Obama did that plenty in the first debate, and Romney shut it down. Of course, since then, Obama has whined that Romney was lying). Ryan is not - he's the guy who does the research himself. He just needs to be on his toes enough to catch the mistakes, because Joe is sure to make them.
What Ryan NEEDS to do is not play defense - he's not defending four years of Obama. Biden is, and I don't think he wants to defend him.