Any Model Railroaders here??

Yup, that's exactly how after looking at my "new" locomotives I'd have described the scale differences between an HO and a Hot Wheels car.

On another note the Santa Fe unit is a Tyco and the others are labeled as Playart. Still an entry level brand I assume? These particular trains are roughly 30 years old or so. Almost threw them in the dumpster but decided to keep them in case I get a wild hair someday.