Class A motorhomes sit up higher and you get a great view going down the road, class C motorhomes have both driver and passenger doors and makes it eaiser when getting gas and such..
Its something you need to figure out, I like my class A, sitting up higher, better views, looks good compared to most class C, better storage on certain A's, taller ceilings, no over head bunk, etc, etc..
Will tell you this if your living with your spouse and a pet for over 2 months a year get 35ft or more with at least 2 slides, trust me, I have a 33ft with 2 slides and at times its small but I don't live in mine, just camp and travel.