Tested bit more my First run (proto mold) XT Colt and prodcution run XT Colt. I have thrown maybe few hundred shots with PR whereas I have only thrown FR just 50 or so times, so FR version is bit less beat up. There isn't any considerable marks on PR version either though.
With my noodle arm (maxing around 90-100 meters), the slighly beat PR Colt flips flat easily from slight hyzer and goes about 70-75 meters or so with very minimal fade. Released flat, it turns gently to right and won't come back, but doesn't turn and burn either. The FR Colt keeps the initial hyzer or maybe flattens out a bit, but still fades at the end even on lower lines.
Have to test bit more, and also have to add proto stamped antidome XT Colt to the mix next time, but I am bit disappointed that the production run became so understable so fast. I don't really care what happens to proto versions, I'm not going to base my bag on already OOP molds. I like the feeling of production run on the hand more though, but I guess I need to find more stable companion to Colt.