I think playing 3-2 zone against a team who has better inside scoring than your inside defence and better (much better) rebounding than you is very, very dangerous.
You can't afford to CT against him again, because if you win your enthusiasm will be ruined for the finals.
So I'd recommend sticking to man-to-man defence, or if you're going to gamble go for 2-3 zone to close the rebounding difference. Base offence may be a good option since his recent defence ratings have been fairly balanced, as is your offence.