Well now, since all the images in the catalog are computer renditions, except of the pilot version of the GS-1, thus, using them to compare is really not any better than if they had showed a HO or N scale model of the same.
However, some of the answers to the question Jack pointed out can be answered, why? Because the drive systems for both types have already been produced. So all you need to do is measure the Lionel Mountain driver and if that number is accurate or close enough for you then that question can be put to bed. Same for the past runs of the GS's with the larger drivers. I never measured the wheels on either of these, but for the most part, you can count on anyone with tinplate flanges in their line up will come in a bit under sized.
The above would be a design decision. Can't really be changed or screwed up on the assembly line.
The decoration (deco) like the ball and wing, that is and can be a production issue and honestly, you will not really know if this type of error is present until the items start to land on the hobby shop shelves.
To pre-order or not, that is your decision and business.
Charlie
