The point is it is always well attended and well watched. I’d really rate them about even and if it’s a problem for the Big Ten with Ohio State/Wisconsin, then the Big 12 has the same issue with Oklahoma and likely Texas to join them as Sark builds them up.The problem with the BIG 10 is that you can basically say Ohio St vs Wisconsin and be right most Of the time. There has only been 1 time since 2011 that neither of those teams were in.
The Big XII has been a much better game historically.
The SEC is far and away the superior game. The Big Ten/Big 12 will always be successful due to the fan interest. The ACC is in better shape than the PAC 12 but not by much.