vs ... who?

Notre Dame? Penn State? Indiana?

If you mean who would be #1 after some bowl games or playoff games, well, we had a playoff and it is OSU.

As it is there was playoff and OSU won it.

Before playoffs. If Oregon were still in the Pac 10 they could have played the Big 10 champion which could have been Indiana. And I could see Oregon winning by a large margin.

Moot conversation because the old Bowl system is history, though it's fun to speculate. And it underscores how absurd the old system truly was.

and I interpreted the question on the old way to mean with no post season. Postseason pairings would affect rankings.

Oregon won on the regular season

whichever - they had a playoff - OSU won and that is that

So, if, as last year it was a 4-team playoff, Ohio State would not even be in the playoffs but it would have likely been among these top four.