Ross normally has a scale look, switch motors are seperate, frogs and rail wiring is not done because it's expected to be custom tailored to the individuals needs by the modeler. No assumtions of methods/options is built in there; "a blank slate" provides easier customization.
The 'Tinplate" is closer to a 'plug and play' unit.
One note: I think the Ross Tinplate turnout line still interferes with the fat driver tinplate locos like Marx's. If you ever want to run a fat wheel loco, the old Marx electric turnouts give full operating ability. They can pass only straight, and in only one direction going through a Lionel turnout (fat wheel against the long straight rail). (fat because the gear reaches all the way to the flange's backside making it way fatter than other flanges. The fat wheels bump up on turnout guide rails & frogs.
