S23 is in the Architecture program and while I don’t think academically it’s overly difficult for him - the time commitment/projects are huge. I think you’re likely to find “easier programs” and “more challenging programs” no matter what school it is.
He likes it there.
A couple of things that may be different at Tulane from the other schools you’re looking at which might be a factor for you (or not).
Tulane went to a mandatory 3 year residency program. You MUST stay in the dorms for through Junior year. The only “out” of that is for students that study abroad the Fall Junior year are allowed to move off campus in the Spring.
The other thing relating to the dorms is that while they have 4 new buildings that have opened in the last 3 years (for Sophomore +), Tulane has a distinct lack of apartment style housing. There is one dorm but that mostly goes to athletes.
Academically Tulane uses its flexibility as a selling point. No student comes in with a declared major. Students are expected to pick a major by the end of their Sophomore year. But the school allows very easy double majoring or major with one or more minors across any of the schools. Not all Universities allow it (or make it as easy). Maybe a factor for you or not.