I know there are some differences between what the D&RG ordered from Baldwin, but to my knowledge...or lack thereof...none of the D&RG 4-4-0s are left. Also, the differences seem rather minor. You could order an 8-18C in all sorts of different flavors, either wood or coal,verticle wood pilot or horizontal iron, etc. It just sort of depended on your needs or desires.
So as the old rock & roll song said, "If you are not with the one you love, love the one you are with."
It has been a pleasure to share Eureka with everyone and I hope we can do it again soon one of these days!
Dan