gshepardbuster, You are right, SKY and WBY shares identical inside core wiring. WBY has 32% more FEP isolation in between wires. AQ Niagara (one 20AWG and 2X 21 AAWG) uses 15% less silver compared to SKY( 3X 20AWG). Perhaps that's why Niagara sounds a little bit warmer vs. WBY.
This gave me some motivation to replace my AQ Cheetah by AQ Niagra (used and authentic one which is not easy to find).
However, WBY connectors are more sophisticated vs. SKY, especially RCA ones. There is a small company in US fabricating those RCA connectors. A couple of years ago, retail price of each WBY RCA connector was ~$350! Four of them are used in one pair!!!! Most of cable companies use Neutrik connectors (~$5), like Nordost Vahilla (~$5500/1m) !! Based on magazine reviews, I tried Nordost Vahilla 1 and I did prefer AQ SKY.
Jafant, I guess AQ Niagra (~$1900/1m) is discontinued and is replaced by AQ Fire. AQ SKY is about ~$2900/1M, AQ WBY ~$4500/1m and AQ Meteor is ~5900/8ft. I need to say that I was sooo lucky to have an excellent deal on my cables.
cheers.