I just took a look at the numbers. Since 2007, Ohio State is 10-1 against Michigan. Michigan's lone victory came in Ohio State's car fire 2011 season.
In those 11 games, Ohio State has averaged 32.8 points per game. Michigan has averaged 19.7. An average final score of 33 to 20 isn't a blowout, but it isn't exactly close, either. I think the games might feel closer because, well, it's a rivalry game (?).
Also, since 2007, Ohio State has scored 42 points 4 times against Michigan: 2007 and then 3 years in a row: 2013, 2014, and 2015. I thought that was interesting.