Schedules are not created equal in college football. Even teams within the same conference benefit from easier schedules than others (hello Texas A&M), but there are extreme differences in the difficulty of schedules when comparing the top teams from different conferences.
A big debate has been occurring this season between Big Ten and SEC fans surrounding who plays the most difficult schedules. Ohio State fans especially like to act like their schedule even compares to the gauntlet teams like Georgia are playing this year, but the data shows that their hypothesis is the furthest thing from the truth.