Thanks for this demonstration, Clay. Listening both through my computer speakers (audioengine5's) and headphones (Grado SR1's) I slightly favor the Amber A string (slightly fuller sound?) over the metal and the prototype. Not a big difference, though, to my ears.
I've tried the Warchal Brilliant strings but ended up going back to Dominants; lower tension and perhaps more warmth. So I don't expect to try the Warchal Ambers. For the playing I do, brilliance and projection are not a major issue.