From the recent St Olaf’s grads we know, plus my own kid’s experience at Denison, I think there is much more in common between the schools and the types of kids than there is difference. The main differences as I understand between the two cultures relates to alcohol and gen ed requirements.
St. Olaf (1) is a “dry campus” – no alcohol is permitted in campus buildings, including dorms – though I’ve heard it described as “moist” – drinking happens, but it’s not supposed to and (2) has religion classes as part of distribution requirements – which as everyone describes, can be fulfilled with eastern religion etc.
At Denison, (1) the approach to alcohol is more about keeping people safe and learning how to drink – when it’s legal – safely. There is a “good samaritan” rule that if a student calls security to help another student who may be at risk because of alcohol or drugs, the student making the report will not be penalized. The on-campus infirmary will get involved if necessary. Similarly, Denison recognizes students over 21 can legally drink, and I’ve heard the new senior apartment building, Silverstein, has or will have a wine bar or something similar, the idea being to prepare students who are legally allowed to drink to do so responsibly. (2) Denison’s distribution requirements do not require a class in religion, even broadly described.
Beyond that, to my mind, other relevant differences could be geographic distribution of students and travel. St Olaf reports 43% of its students come from Minnesota and another 24% are from the midwest, with 4% of the students from the east coast. Denison reports 23% of its students are from Ohio and, while I can’t find specifics for other regions reported by Denison, my son’s experience was that Portland, Maine to DC/NoVa corridor was the most common, plus Chicago, North Carolina, and California. So while there aren’t quite apples-to-apples comparison on geographic diversity, Denison seems to have broader geographic distribution, including 19% international students vs. 7% at St Olaf.
The OP said that there is a sibling in NY – lots of Denison students in NY area so plenty of opportunity to travel together. Columbus airport is about 25 minutes from campus and is an easy in-and-out airport, the kind of place you don’t have to tack on an extra hour to plan for delays in getting through security, traffic etc.
Beyond that, I would suggest reaching out to both Admissions departments for connections to current students and faculty in choir and key academic areas of interest. Talk to current students about actually doing choir and other music-related ECs on campus. I’m tone deaf (my family would say in more ways than one), so have no sense of competitiveness to “make” choir at St Olaf vs. Denison, opportunities for students at either campus to be involved etc.