Once again, Scher bought two of what I bought only one. He probably double-heads them too (which would be really impressive!).
Anyway, I agree with Scher, based on running mine. It has all the quality of the Vision Line but is bigger and more impressive than the Hudson, etc. Certainly the only locos that can possible match it might be the JLC Big Boy or Allegheny. Both are equally detailed and such, and even larger so just a tad more impressive there, but they don't have quite a good sound and vision modern features, so in my book its an even match with a slight nod to the challenger just because its newer and has such good sound and smooth running.