Comparing a C and an A of equal length, they are about the same height and width. An A typically has more usable living space, since the front two seats usually swivel backwards and are on about the same level as the floor of the coach area. C seats are much lower and set apart from the living area. However, if the overhang in a C is configured as a bed, then the C offers more sleeping space. A lot of folks will say it's easier to drive a C, but I think an A of the same length is easier to drive due to better visibility and a tighter cramp (turning) angle on the front axle.