You could always go the route I did and get a set of both?
I saw the original Metroliners in service twice. Once on the far track stopped at Metropark Station when my family was waiting for a lowly clocker and then once when they ran on the Keystone Corridor after rebuilding right around the spot US30 crosses under near Lancaster. I was young, but they still left an impression.
I'm waiting for my favorite manufacturer to announce scale ones. (I have no insider knowledge of when or if that will happen at this time)