I have all three and suspect that one may not notice any difference, unless they really want to (expectation). The differences in SNR are so very small and distortion below what we can hear. The only thing with my Modi2Uber is when there is no music playing there is a small amount of noise in the backround when using the optical link. I've emailed with Nick previously and will get around to sending it back for service. The Coax and USB connections are quiet.