On30 C&S "set" and spectrum differences

[CCSII]

In G scale the Spectrum designation means two things. One, the 1:20.3 scale makes it easy to identify a Spectrum product.

Not so much in On30. I have a C&S On30 set from five or six years ago. It is not labeled Spectrum. I also have two coaches in On30 in boxes labeled Spectrum. What are the differences between the two sets of coaches and also is there a Spectrum Mogul that matches the Mogul in the set and what would its differences be?

Thanks in advance

[the Bach-man]

Dear CC,
All On30 items are in the Spectrum line.
Have fun!
the Bach-man