My Holyoke is an awesome school with really smart young women. It’s just as academically challenging as Smith and leans liberal for sure. Not quite the as activist vibe I felt at Smith. Nothhamptons culture and social scene is very tied to the Smith culture imho. But that was 20 years ago.
Smith is really great too and one of the prettiest campuses you will find. It has produced many successful and super accomplished grads over the years.
I was part of the five college system in school and didn’t take advantage of it. But had friends at both schools. My Holyoke was, to me, a bit more “chill” But that was as a visitor.