Comparing different USB cables is very like comparing any other audio cables. The differences are very easy to hear. Pick a piece of music you know well, listen to it via a standard USB cable and then with the C-USB in place. Detail will be clearer, voices more natural and critically, music should sound more coherent and easier to listen to.
Heavy gauge, oxygen-free, silver-plated conductors. Low loss, gas foamed polyethylene insulation. Twisted pair data conductor configuration. Dual layer, high frequency effective shielding. Gold-plated plug and signal pins.