Where are you looking to work after getting your mba? Do you like snow?
I think in general, Tuck is the better bet for general management/consulting. Ivy league prestige, generally higher ranked, and places well in general management/consulting firms such as MBB. Also, case study is used exclusively, which is great for gm/consulting types. However, Duke placed well last year at MBB too and its energy and healthcare management programs are well regarded. For what it's worth, I think it's an easy decision in favor of Tuck, but I'm biased