USB cable differences? AFAIC, when you're in digital-land, especially when it involves data (perhaps except the RedBook CD format), data integrity concerns dictates that what goes in at one end will appear at the other, but if it doesn't, the error-correcting codes transmitted will ensure error-free data transmission.
Imagine for example, your digital camera transferring images to the computer with different results with different cables. Now doesn't that sound absurd? Also imagine having an external drive connected to your computer via USB that will show read/write errors using less-expensive USB cables but no errors with expensive USB cables. Digital transmission should just work, 99.99999999999% perfectly, on any approved digital cable, except when the planets lined up and their rays hit maybe...