I haven't looked on either site for a couple months, but if you want something done by Turnbull you need to contact his company.
That's what I thought, so comparing a USFA SAA worked by Turnbull to a stock factory Colt is apples and oranges.
Factory vs. custom.
For my taste, I like the latest Gen. 3 case colors better than Turnbull's. Colt's colors are more subtle, Turnbull's much brighter. His stuff is pretty and all that is a matter of what pleases the eye.
Some of the earlier 3rd. Gen Colts were too dull and gray.
DF