It depends on the specific rig, but in general probably so, for a gas class A. Most diesel class A's have air suspension, so would certainly be better. And like Tom, gas or diesel, I prefer to drive a class A -- better view, even (especially) while driving, more usable interior space for the length, more storage capacity. So much depends on your intended use, though.
But as Dan said, go test drive some of each, since your opinion is the one that really counts, for your use.