Freightliner Super C -Which cab/chassis is best

Looking at Renegade Super C RV 34-36 foot. Trying to decide which Freightliner chassis is best for us. Smaller engine/GVW or Larger L9 with 35k GVW. Concerned about ride quality, Drive ability, and engine noise. No info on Freightliner web site. Any comments on ride quality appreciated.