Yeah I thought that OU seemed to have a talent advantage in most spots, but Nebraska didn't look physically outmatched or outgunned, and that was pretty important. In fact, I thought Nebraska looked like the more physical and aggressive team for good chunks of that game. I doubt OU runs into any other team like that on the Big 12 slate.
At the end of the day, I think the key difference was that there were a lot of plays where OU's dude was just better than Nebraska's dude. The only way Nebraska was going to win that game was if their execution was at an all time high and hope that OU made mistakes, and unfortunately, neither of those things happened enough.