I'm going against the grain (and all empirical evidence) and betting the o1.5 in the Kato/Gracie fight at +200. My reasoning is that Gracie BJJ is the toughest style to actually finish in MMA, because if he gets rocked he can flop to his back and recover without concern of a followup (much like Diaz vs. McGregor 2). This is why Rickson refused to fight other than a no time limit ruleset. He thought he could never get finished and wear down anyone eventually (unfortunately no wanted to see this type of persistence hunt).
I'm also playing Gracie for 1u in this spot, because if I'm right I'm not sure Kato will have any idea what to do late in the fight.