And there was another benefit to/of the group setting ...

Professor: Well, like I said, Julian was a brilliant businessman with progressive ideas—he saw that another small private art school where all the students were women was very popular at that time, and that’s probably why he adopted the women-only classes. These classes were typically offered by, um … by established artists and were held in the studio, the … the place where they painted. This was a big deal because finally, women could study art in a formal setting. And there was another benefit to the group setting of these classes.

Source: A listening practice from ETS, English Testing Service. A professor and his students discuss "Women Artists of Late Nineteenth-Century Paris."

What's the difference if I say "of" in this context?