Our Chevy Cobalt sedan (the orange one) sits parked in front of a Cobalt coupe (the black one). I took this picture because it shows the difference in the profiles of the sedan and the coupe, but also because I was surprised to see that the two versions of this car appear to have the same or a very similar wheelbase. According to the specs near the bottom of this page, that's true—the wheelbases are the same. Not only that, but the coupe is actually two tenths of an inch longer than the sedan in overall length!

From my perspective, the only reason to prefer a coupe would be that it is smaller, perhaps sportier, and more fuel efficient. With the Cobalt, the coupe may be sportier, but that's about it. Seems nutty to me...