This is easy. If you see 2 rails it's 2 rail, If you see 3 rails it's 3 rail. Whether it's to scale or not is decided by measurement. Calling something scale whether or not it has a Kadee coupler is ridiculous. Putting a Kadee coupler on a car doesn't change it's dimensions. Want to be accurate, why don't we go proto 48 3 rail. This stuff will never be perfect! Get over it. Do what suits yourself. Have fun.
ECI