R2D2 vs Chewbacca: Who would win?

In some ways, we can construe this as a classic "Technology" vs "Nature" battle. Where high tech takes on no tech. It's the ultimate philosophical slash pop-culture analogy for, well, I'm sure, something...

So, basically, I'm just saying I'm curious what others think. Who exactly would win?

Earlier I wrote down this - and was even pretty confident about it. But now, I'm not so sure. Especially when I think back to that chess-like game in episode IV and the whole "Let the Wookie win" incident.

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In my realistic mind, Chewbacca would rip R2 apart. In a Lucas movie, R2 would ludicrously win, and would not permanently harm Chewie in doing so.

Without engaging in a byzantine escalation of obscure plot references, Chewie seems to always be working on something in the background while still participating in the main plot action. This indication of his capability to multitask, including during combat, is typefied by the dramatic melee on board the Millenium Falcon on the ice planet of Lur. Han deals with one or two of the mob of assailants, leaving the other five or so to Chewbacca.

Besides, I've got to give a hirsute brother some love.