The taste is the same, but the classic elbow macaroni is probably the best for flavor retention and mouth feel.
It also lends itself to adding your own ingredients...like real sharp cheddar, colby jack, and Parmesan cheeses...add some black pepper, a bit of garlic powder, and some Mrs. Dash you got yourself something that tastes damn close to homemade.
Where's the neither option and or home-made taste better than the box crap?
I personally HATE boxed food because of all the preservatives and unnecessary crap they they inject into the stuff. I'm had the box stuff before and YUCK! It's horrible! How can we allow ourselves to eat such nasty stuff?