Here we go again, this subject has been beat to death on this site. In most instances the people who own the gas models know more about the diesels than the people than own them and vise versa. I recommend driving the coach's you are interested in and make up your own mind.The floor plan is the most important equation. When we bought our coach I couldn't find a gasser with the floor plan I liked, and at that time the used upscale diesels had poor floor plans that fit our budget. We ended up with full slide Fleetwood Discovery. Some turn their nose up at that coach but we are happy.