Lots of variables here. You can get high end gas and low end DP's so it's hard to answer your question. What's your budget? A budget of say $100k will get you a fairly new Gas MH and a 10+ year old diesel one. What are you going to be doing? Full time and if so, long stays and infrequent travel days then I would go with gas. Long drives and shorts stays go with a DP, because while some DP's have better interior finish and amenities, it's not that dramatic. Depending on your budget, you may find that parked they feel identical. Production brands are built on the same assembly line as gas ones. The largest difference is ride. A rear diesel with an air ride will ride and feel much better than a gasser - but parked that advantage becomes irrelevant. If they cost the same it would be a no brainer and gassers would cease to exist. But the same year, length and floorplan, and quality the prices are very far apart. We owned 2 gas MH's before our FW and despite each being new when we bought them, the F53 wore me out driving it. Lots of noise, road feedback and felt like I was beat up after a 4 hour drive. Couldn't find a DP I liked in our budget so went with a truck and FW.