Congratulations!!! Both are great programs and Fuqua is definitely a darling for many.
I will address the most trivial comment first (as human nature has it) - North Carolina can and does get chilly. I have heard a number of Fort Bragg folks comment on how chilly it gets at night; it is a bit deceiving.
The reason for the trial question first, is that it is a tough call. The biggest pros you will have with Fuqua is on-campus hiring (450 students are a lot more attractive for employers coming to campus than 185 at Kelley). Also many MBB's have offices in the Duke campus where they spend 4 days a week observing students during classes and conducting interviews year-round. Just a glimpse of it perhaps.
Also, Brand Management is a very competitive field and has changed over the years (you probably know better than I do) and now it means two things - either you do copywriting and proofing OR you actually do brand management but you are very senior. You probably want to speak with Adcom to get some background on career services and any current students to get a better idea about both - I would not just trust the bare numbers. It does seem like Kelley sends 30%+ to Marketing but is that because all of them wanted to be in Marketing OR is that just because they could not find better jobs? Same question applies to Fuqua but with Fuqua, it is clear you will have more on-campus exposure to employers and more doors that will be open and not require knocking on. (hard to quantify though). Additional benefits is a larger more diverse student body, better professors, and a greater choice of elective classes. Again, hard to quantify.
Congrats again on the dilemma!