Just switched from a Audioquest Carbon USB to a Curious Cables USB, and the differences are very audible. Most noticeable is the much better bass control. Furthermore there is more "air" and holographic sound. Best cable upgrade so far.
(Setup: Wharfedale Elysian 2, Musical Fidelity NU600, Spring 3 KTE, Apple Mini M1 with Audirvana, Silent Angel Bonn N8 + SA F1 power supply, REL S/510 sub, IFI Power Station, Goldkabel Executive XLR, Supra XL Annorum speaker cables, Furutech PowerFlux power cables)