Yay, another long post full of speculation masquarading as facts. I do love reading these (seriously). Anyway, as speculative as Adbula's post is, a lot of it makes sense. Kabuto bringing along some form of antidote(s) while on a mission to kill a known poison user seems pretty likely, considering he's not an idiot. There's no way to know for sure, but assuming he and Oro were prepared to kill Sasori the question really boils down to, would Sasori's poison be too fast acting Kabuto to counteract on the fly in the heat of battle, it would be illogical to assume he didn't bring some form of anti-poison equipment along. (Also if you remember Chiyo took the poison and was able to function far longer than Kankuro, medical training perhaps..who knows?)

Random correction: Tsunade said Kabuto was more skilled than she was when she was the same age as him (Kabuto was 20 at the time and Tsunade was 51). It's never explicitly stated whether she learned anything new after turning 20 or not, but I would think it likely she picked up a thing or two in that time.

As to saying Sasori's attacks are 'easy' to dodge it's somewhat unfair to base that conclusion off of the ability of the woman who trained him to predict and react to his attacks. Based on his loner attitude it's likely that the only people who have seen him do anything are Chiyo, Oro, Diedara and all the people he's killed. Of the three, Chiyo would probably understand the underlying patterns of his fighting style the best since she was the one who taught him the basics of puppet fighting. While he obviously improved a lot while away from her I doubt anyone would have a smaller handicap against him. Oro is Oro so I put him into the omnipotent category, I doubt he'd have trouble dodging anything and even if hit and poisoned he would be fine due to plot armor. Kabuto on the other hand, is not a fighting specialist and not nearly as important as Oro in terms of plot armor. He shouldn't be able to do as well dodging against Sasori as a Chiyo guided Sakura did but it's not a stretch that he'd have cooked up some crazy super-antidote concoction before the fight.

In conclusion in a fight between Sasori and Oro. I say Sasori loses due to the plot armor (AKA sheer badassness) of Oro, plus Kabuto having already prepared every known antidote ever and brought it with him to the fight just in case. The bringing all the antidotes thing is a stretch, but Kabuto is Oro's henchmen, while Sasori is just a mid boss, mid-bosses don't kill party members, even evil party members.