I think OSU is closer to Auburn than Oregon. Much more running between the tackles than Oregon. Very physical.
You're right. The more I think about it and watch some of their tape, the more I see the Counter Tre, Inside Zone and even Power concepts. They definitely have a much more physical brand of running game than Oregon does. It's pretty crazy how many variations they have of each using different formations, pre snap motion, jet sweep fakes, etc.. Here's a pretty cool link...
http://www.elevenwarriors.com/2013/02/20094/the-urban-meyer-ohio-state-offense-base-run-game