I go to school in the East, and having had both, I have to hand Five Guys the victory. In-n-Out has notoriously bad fries and good burgers: Five guys has a different burger that is legitimately delicious in a greasy, melt-in-your-mouth sort of way, and their fries are fantastic (though they give WAY too many).
...while FSDC was squarely in the In-N-Out camp.
As someone who is from California and now resides on the East Coast, I wish that In N Out was the one invading. Five guys IMO has better fries, but for burgers I'd probably rather have a double double - especially when you consider Five Gives is twice as expensive.
Thanks for reading, everyone. And be sure to check out Open Wire, where you can share links, feedback, and opinions on the stories you think we should be covering.