You posted the same pro-con list 3 weeks ago and despite getting 40 responses, your initial impressions haven’t budged. It seems to me that there’s no point in soliciting advice from yet more strangers if you’re not going to apply the information to your uniquely personal situation.
“BUSINESS” is a massive career category, spanning millions of possibilities and variables. Of course Williams grads succeed in business as do motivated graduates of most every other college.
My son graduated Williams and I from the University of Michigan. Although we both got wonderful educations and found success and satisfaction in our respective careers, I can tell you our college experiences were very very different.
I urge you to consider what each choice has to offer in the context of person you are today. In other words, put your hazy career goals to the side for now(with the assumption that you’ll succeed no matter which you choose) and focus on the educational environment that can best transform “anxious” to “confident”
At this point, days away from the decision deadline, you need to go with the choice that fills you with joy and enthusiasm. No one else can do that for you.