I've lived in MA all my life, where there's a Dunkin Donuts on every corner. Honestly, their donuts aren't that good. Their coffee is good, and their muffins are great, but their Donuts? Usually a little stale and dry, and hardly delectable. They don't even make the donuts at their stores. They're made at factories, and then trucked to their various stores on large racks, already hours old by the time they've reached the stores.
Krispy Kreme opened their stores here a few years ago (and then closed them a year later), and I have to tell you, it was a personal donut epiphany. Their donuts are moist and delicious, and if you get one hot and fresh right out of the fryer, my god. There's nothing more pleasurable than biting into a hot KK donut.
KK, by far.