Both teams are coming off big wins, but the public is valuing the Wisconsin win significantly more than the Minnesota win. Nothing quite says “punting” like an 11am CT kick at the notoriously hostile Ryan Field in Evanston, Illinois.
Purdue is coming off arguably its most impressive top to bottom performance of the season (I would entertain the Illinois game slotted here too), and yet, most people are giving Northwestern the benefit of the doubt given the amount of money skewed towards the Wildcats. They held Iowa to 10, gave up 34 to Minnesota, and beat Wisconsin by 14.
The Wildcats have been blown out against the lone quality team they have seen (PSU) but have won some surprising games in the meantime. You want to see a Jeckyl and Hyde schedule? Northwestern.