I bet you we haven’t played 4 games in the tournament yet so that would be, even if true, entirely irrelevant to this point. A four game sample size is too small to extrapolate any kind of point from.I bet if u look at the defensive number for those 2 teams for the first 4 games of the tournament I bet you’ll find that they were among the top of the 68 team field.
Edit: to add to that, if you’re correct about the 4 game figures being better in the tournament, you actually dismantled your own point further because that means the defensive efficiency numbers had to have been even lower entering the tournament