It being two on one makes it kind of tough.
I would guess that RotS Obi Wan > AotC Dooku though. Then again, Dooku's Makashi probably helped even the odds for him. I don't know how well Obi's Soresu would do. We saw him switch to Ataru when he was outnumbered against the Maul brothers. He did well, but I can't help but think that was more of a fluke than anything.
So my guess is RotS Obi Wan 6 - 7.5 / 10.
Attack of the Clones - 22 BBY
Revenge of the Sith - 19 BBY
I always thought the time gap between the two movies was much larger. By our standards, the Clones Wars were a rather short affair.
I have no evidence, but I would imagine the war would have still toughened up Kenobi enough to win 6 - 7.5 / 10.
I wonder how RotS Grievous would fair against the AotC pair? I guess my train of thought is that if Grievous could win this fight, then RotS Kenobi could as well.