They say the difference in how much better a DP rides compared to a gasser is also the same story in how much better a class A rides over a C. We rented a Class C years ago and you couldn't even lie on the bed it was so rough and bumpy. The cab area is pretty much unusable while parked in a class c where in a class A it becomes living room seating as well as the panoramic window. Speaking of, the seating position in a class A while driving is far better than a Class C. Your field of vision is wider and higher and you are over the wheels so turning and judging is easier. There is a reason that Class A's are at the top of the food chain in the RV world. They ride better, more usable space, better amenities, etc.
plenty of nice Class C's but dollar for dollar I think A's just have a lot more to offer.