Krell CAST vs. Other High End Interconnects

I have just bought a Krell KCT preamp, to match a Krell KPS28c cd player that I have in my system. I have been using the Krell KPS28c with a Krell KRC-3 preamp and connecting the two with Audioquest Amazon balanced interconnects, which are silver-based interconect cables. Now with the KCT, I am thinking about trying out the Krell CAST interconnect cables between KCT and KPS28c.

Do Krell CAST cables really sound better than other high-end balanced interconnect cables of other brands? Has anybody done any comparison between Krell CAST cables versus other high-end interconnects?

Krell CAST cables seem so cheap versus other high-end (silver or gold based) interconnect cables.....so if CAST cables are so great, then why aren't more manufacturers adding CAST to their input/output connections on the equipments they sell?

Thanks for sharing your experience.