I have a 5 quart Kuhn Rikon and purchased the seven quart model because it's better for stockmaking and for leftovers where favorite recipes are concerned
Not yet owning an RV myself, I'd think that a width difference would be a greater problem than a height difference when it comes to stovetops. Potential drawbacks: 1 storage cabinet height, and 2. Leftovers (given the small size of refrigerators in many of these little
fiberglass trailers.