I just noticed this the other day.
When I put an original N-scale Kato GP9 (circa 1990) alongside a newer Atlas GP7, the GP9 measures 2 ft longer. Most of the difference is in the long hood, but the short hood is slightly longer as well.
I was under the impression both locomotives used the same frame and body parts. Is this an actual difference in the prototype, or is one of these models inaccurate? If so, which one?
TIA
Mac B.