I think they are peer schools – both outstanding. In early 80s, Dartmouth was the tougher admit and more prestigious. Today I’d say it is flipped in Duke’s favor on both counts. But we are talking about two great schools with different pros and cons. Generally I would say pick just based on fit and it would be perfectly reasonable to pick either. But with the $ difference and being a Rubenstein Scholar, seems like the best decision is Duke unless you really feel Dartmouth is a better fit (e.g., you want the quarter system, cold weather, a very high % of students it Greek system, rural location) and you can afford it.