Audioquest Castle Rock vs Pikes Peak

I am looking at upgrading from my Kimber 8TC biwire speaker cables. I have a dealer demo of the AQ Castle Rock and they are a very nice improvement in my system. Bat VK-30 pre, MF A308cr amp, Rega Saturn, Music Hall mmf.9.1 with Zu 103R. Kimber KCAG interconnects.

I see that there is a set of AQ pikes peak biwire on Agon and I was hoping someone may be able to offer guidance or opinion on either or both the castle rock and pikes peak?

$13oo for the Castle rock vs $550 for the pikes peak.