I scored these today. One is 20x2.125 and the other is 20x1.75.
Wondering what the deal is with the different labels. Which is older?

The Grey/Green/Blue hot patch is older. Not for sure of the dates produced but I purchased some of them (older label tires) from a shop back in the mid 80's. Belive the Yellow/Orange label came out in the early 90's. I purchased some of those, when I worked in a shop, back in 95 and they were some of the last skinwalls produced. There was a reference page or email sent out last year that listed most of the Comp's tire history with hot patches pictured. Not for sure where to find it now? Hope that helps somewhat.