I saw at the Tampa RV supershow there is a new class of rv called an RUV,,,to me they are just mini motor homes which Winnebago made for many years called mini-winnie . so they are not really a new...
RUV is a marketing term for a small class A as posted earlier. The fact that it is on a different chassis than say the F53 does not change the classification, it is still a Class A.
This is very similar to the Class B+ which is actually a Class C with the optional bunk over cab area removed and streamlined. So in reality it is a Class C minus the bed, but a designation of C- would have been a non starter from a marketing perspective.