We went to the shopping outlets in Leee Mass last weekend and a Road trek parked near us. I snapped a couple pics.
The roadtrek appears to be narrower but taller. Much smaller rear window than the Rialta.
I'm sure they have a V8 engine and get probably 1/2 the MPG that my 5 cylinder VW engine gets! LOL! Of course, they can tow more weight and don't have any problems going up really steep hills.
I wonder if a 6 foot person has to sleep diagonal in the roadtrek. It's not very wide!