I think WBC tacitly admits this in their reply – Mogami 2803 is said to offer the highest definition while all the 2.x items trade signal purity for noise rejection. Some time ago people started adapting pro audio and PC hardware for home audio use, and they may have missed the original intentions (i.e., long cable runs, managing electrical interference, etc.). However, various websites prove that many do buy based on specs and measurements.
I personally don’t think there are differences I care about across the vast majority of cables upon reaching sufficient electrical quality. Plus, there’s even less variation within the WBC product family. My concerns include possible interference in the cable “rats nest” behind a complex setup, and that some cables could sound warm and thereby not be suitable for some setups.