We just moved from a a B to a C - needed more room for the wife and the dogs! We found that the smaller C units were on the Chevy Workhorse base. Since then I have learned that the Chevy has a smoother ride, better mileage and a LOT more leg room in...
Just did the same thing - went from Class B-Pleasure-Way Excel to a Class C - Fleetwood Tioga Ranger. The extra room is wonderful - just getting used to the larger rig. Good luck!