Gas vs diesel class A questions

Is it true that diesel is a cushier ride than gassers? yes I have had 3 gas motor homes, 1 with air suspension. And does it get better gas mileage? Yes, it doesn't burn a drop of gas. HA HA ok fuel mileage is simliar. I've gotten from 5 to 9 mpg with gas, fuel 7 to 9. Does it climb hills better and do better going downhill as well? Mine is a 300 Cummins ,it handles mountains much better the any of the gas. Downhill is different the diesel has an engine brake so you shouldn't heat up you're brakes. Gas will get hot brakes if you aren't careful.