All I can think of is maybe Cowboy Propaganda recognizes certain guns as icons and the rest as obscure variations? I bet the 60 is more popular with CW reenactors and across the line of ML Colts, all I can see is comparable features, so must be something about a certain look. The Rems seem more awkward and perhaps more heavy than the comparable cal. Colts to me, but have some better features that make up for it. If I were looking for one, I would choose the best quality of construction and authenticity over model to a large extent, if comparing some lying on a table for sale. And maybe price.
Your gun is like your nose, it is just wrong for someone else to pick it for you!