Hi Melanie,
Yes, Dugan made other than iridized glass; actually much, much more "other", and green is not a particularly scarce color for Dugan. I do know that the Question Marks Compote has been reproduced in opalescent glass, and they are virtually impossible to distinguish from the originals. Whether the Compote has been reproduced in the green, I do not know. As to scaracity - the Compote is probably scarcer in the colored glass, but more valuable in carnival. Why? Do in large part to the reproductions and, of course, the demand side of the ever present ecconomic principal. Probably not what you wanted to hear, but I hope this helps a bit anyway.