Disclaimer: I have never owned any R-o-W pieces.
I always thought of them as "high end 3 rail", and not equivalent to "high end 2-rail".
A while back , using 'bay as a guide, the stuff was by comparison being given away -- now the pendulum has swung the other way, in part due to one or two vendors who think these are really wonderful / collectible [ or is it collectable ], etc -- and no doubt think "buy low, sell high". Especially in 3 rail, a high price does not always equal "quality", using "quality" in a 2-rail sense [ fidelity / workmanship, primarily]. I do agree that they meet my criteria for a collectible item from a quantity / short lived producer standpoint -- the question is "at what price point ?"
Benson was a ground-breaker in the commercial "scale model on 3 rail track" area -- he even coined the phrase "Scale-Plate" [ and tm'd or copyrighted it as I recall ] -- and that describes his products very well.
If I were a three railer, especially 3RS -- I used to be, even a 3RS one [ before the term was created ] -- I think I would consider a R-o-W model only where no model of the same prototype [ a B&O articulated, perhaps ? ] had been made by in the past five, say, years, by the hvwt 3 rail vendors -- unless the price were exceptionally attractive. Somone else might have a different view, perhaps equally valid.
To not coin a phrase: Opinion.
No offence meant to the posters above or any others who like the models, of course.
Best rgds, SZ
Edited to add: A search on the OGR forum provides a number of photographs of RoW products, though mostly cabooses. But those can give you an idea of where in the "scale model spectrum" they fit.
Further edited to add: There is a very well illustrated set of "PRR" passenger cars currently on 'bay which answers exceptionally well bob2's original question. They are not even scale length, and the box end suggests 'one set fits all' irrespective of your road name. Etc, etc.