If your goal is to get an MBA, do something different for undergrad and that would be engineering at Tufts. Boston has better seafood than Atlanta (by far) and it’s easier to get into the city from Tufts than it is from Emory. Why are you worried about prestige? Both are great schools that will get you where you want to be at the end of the day.
I do know that Emory is being incorporated into the city of Atlanta and that there is talk or building a MARTA station next to the campus, but that would be years away. Tufts is 15 minute walk from a Red LIne stop on the T at Davis Square in Somerville.