You're mis-remembering a bit unless part of the equation of defensive chemistry is that it inspires you to play well on offense. During Mo's first year two years ago we matched the defensive numbers of the tourney team...we just cratered on offense.
Some numbers that show you are the one mis-remembering, and not just a bit.
Steals. Like I suggested, we generated a lot more of them. A whole entire steal a game more. This seemed obvious to my eye, and it is also obvious looking at the stats. Generated more runouts, which were huge since we were challenged offensively. We ranked an alarming 102 spots higher in the nation in steals than the outfit you are suggesting was just as good defensively.
FG % we improved from 94th to 65th in this category. However, when you look at 3 pointers, we got way worse. And we allowed more attempts. We allowed 1.6 more 3 point attempts per game. When more shots are 3's the sum fg % is obviously going to go down, which is what happened improving from 94 to 65th. However our 3 point percentage defense seemed much worse to my eyes. And it was. A whopping 2 percentage points worse the following year. We dropped 90 spots from 44th in three point percentage allowed to 134th the next year.
offensive boards. We allowed the other team half an offensive board more per game than the tourney team
Steal percentage. Went from 10.5 all the way down to 9.5. We dropped from an awesome 55th in nation to a pedestrian 167th in the nation.
Defensive points per 100 possessions. On the surface, it might look like we improved the year after the tourney team. We allowed 97.3 points the 2nd year verse 99.5 the tourney year. However, when you look at our rank in each we were better the tourney year, as I would have suspected. 73rd in the nation the tourney year. Dropped to 85th the following year.
3 point attempt rate against. Allowed 35.6 percent attempt rate in tourney year. Went up to 38.2 the next year and they shot it an alarming two percent better as I mentioned earlier. This is bad, and one of the main reasons our defense way much worse.
effective FG percentage This is one category that we did improve on slightly the 2nd year. We went from .476 to .468 and improved from 98th to 87th.
offensive rebound percentage allowed. Tourney team gave up off. board 29.5 percent. Next year was up to 31.1. We ranked 101 and fell all the way to 173rd the next year. We were obviously in much better defensive rebounding position first year, which is a big part of team defense.
You add all of this up and it is not particularly close. The tourney team was easily the superior defense. Simple eye test told me that though.
Stats are stats, but it doesn't necessarily point to your "It's Molinari" theory. We had Leslee Smith that year, and a somewhat motivated Walt. Since then we've had no bigs. When you have to double the post, you will give up more 3s. The offensive rebounding discussion is also personnel based, IMO. I don't disagree that the tournament team defense was better. But there was going to be a fall off no matter who was coaching that D.