I am confused when you state better results. What differences have you heard between USB cables or are you expecting to hear?

Frankly, it hard to accept that there are audible differences between USB 2.0 cables given that the signal is digital. There are currently 2 specifications for USB: 1.0 and 2.0 with 2.0 being able to support 1.0. If your USB slot on the computer is 2.0 (not a given), it should be capable of passing a specific bit rate over a 2.0 cable to a 2.0 device connected to that cable. The maximum bit rate is now 480M bits per second. It has been that way since 2000.