This is a "how long is a piece of string?" question.There are numerous unknowns/unstated specs/criteria. Are you comparing a 32 foot gas coach with a 37 foot diesel pusher? Which chassis is each coach on?
We've owned a 29 foot gas class A coach with no slideouts and a 38 foot diesel pusher with 3 slideouts. The gas coach was on a Chevy P30 chassis, while the diesel pusher is on a Monaco/Roadmaster chassis with 8 air bags. The DP drives/rides much nicer than the P30 did, and we've never found maneuverability to be an issue even when towing a Chevy Suburban. We've never attempted to visit tourist sights with either coach, and both towed a car or SUV for transportation at our destination.
The front engine on the gas coach was much louder (for driver and front seat passenger) than the rear end diesel, especially when pulling uphill.
I suggest you spend some time at RV shows, check out floorplans, kick tires, and drive a few coaches. You'll eventually find the right coach for you.