Gas or Diesel?? which is better

Greetings all. I'm a newbie on the forum, but on my 3rd RV in 22 years. Started out with a 25' travel trailer in 1996 I used for work and leisure. I sold that about 15 years ago. About 4 years ago I found a need for another RV since I was traveling for work. I thought of getting a trailer again, but wound up with a 1999 Bounder 30E with a Ford Triton V10. The gas class A only made a few trips in the Florida Gulf Coast and Florida Central area. However, between the noise, the vibrations and the rough handling, I knew I would need to move up to a DP one day. That day came 2 weeks ago when I traded in the Bounder on a 2004 Gulf Stream Crescendo 36 foot with a CAT C7 300 hp motor. Driving from Orlando to Tampa in the gas Bounder and then back from Tampa to Orlando in the diesel Crescendo was a 500% difference in ride and handling. Air suspension, air brakes and the engine in the rear is the only way for me. This is the retirement RV when I go into retirement in a few years. Caterpillars are expensive to own and maintain. I know that having owned a 35' Sports Fisherman in Miami Beach 15 years ago, which had twin turbo CAT 3270s - the big marine V8 engines. However, for dependability and durability the Caterpillar website lists the C7 engine as having a 1/2 million mile lifespan before any major repairs as long as the owner performs routine maintenance. This was the deal clincher in trading in the gas class A for the diesel class A. Happy trails.