24 ft or less B+ with over head bed.
In looking on line I notice most B+ MH's eliminate the long overhang over the front cab and the Queen bed. They look more aero dynamic and have less overall height. Some claim they ride better than a ...
Forum Discussion
I don't have personal experience to compare with, but ride quality should be fairly similar if they're based on the same base chassis. Most of the weight of a motorhome is towards the floor; the CG difference between a normal class C and a "class B+" is not that great, and the overall height is also not all that different as it's mainly determined by the height of a human plus the floor height, neither of which change a great deal between the two styles. The somewhat improved aerodynamics probably would contribute to a bit better cruising at highway speed (better acceleration when passing, etc.). Likewise, if a little less tall overall, they logically should do a bit better with crosswinds and not getting pushed around by passing semis.
Overall ride quality will be influenced much more by the chassis used, the length, wheelbase, weight, and balance of the finished vehicle, the suspension setup and tuning and improvements (if any), etc. Since most B+ styles are more towards the upper end of motorhomes in price and furnishing and so forth, it's not unreasonable to expect that they've paid due attention to these sorts of things, which may not always be expected to be the case as much for more budget class C's. Expectations and reality are, of course, not necessarily exactly the same.
Overall ride quality will be influenced much more by the chassis used, the length, wheelbase, weight, and balance of the finished vehicle, the suspension setup and tuning and improvements (if any), etc. Since most B+ styles are more towards the upper end of motorhomes in price and furnishing and so forth, it's not unreasonable to expect that they've paid due attention to these sorts of things, which may not always be expected to be the case as much for more budget class C's. Expectations and reality are, of course, not necessarily exactly the same.