One has to look at student/faculty ratio, not just class size. The overall size of the faculty at Carleton looks to be around 221 vs. around 127 at Morris – for very similar sized student bodies. If the class sizes are similar, that suggests that faculty at Carleton have a lighter teaching load than the faculty at Morris. That means that the faculty at Carleton have more time to devote to each of their classes (and the students in those classes), and to furthering their scholarship as well.