I don't know who us is but you have 7 posts so I question whether you are one of us.
I don't know a lot about NDSU but I am wondering which player keeps Woodard out of the lane? Who out rebounds Spangler? Who keeps Cam Clark from going off for huge points like he did against Michigan State and Kansas? Who shuts down Buddy Hield, Who shuts down Cousins?
Lets assume, for the sake of argument, that NDSU's starters can hang with OU's starters. Now you get to the bench. Which bench player on NDSU is more athletic than Booker, Neal, Hornbeak or Bennett? I am pretty confident the answer is no one.
I don't mean any disrespect to the guys that play for NDSU. Everyone of them is a far better athlete than I ever was but they are not guys that had opportunities to play in the Big XII, Big Ten, SEC, Pac 12, etc. There is a reason they signed with NDSU. Perhaps a couple of them could make a major conference team but most of them couldn't.
If OU plays a solid game, OU wins. It is as simple as that.