Why do digital cables sound different?

If all this is true, how come that the Purist balance digital cable between my cd and dac sounds different than the Nordost digital cable in a direct swap?

I still dont understand what is the point in having a 75ohm cable when the input and output impedences of the components are not really 75ohm. Unlike pro equipment which seem to be true 75ohm with a transform termination. I do not see any transformer termination in consumer and even some high end equipment. Is it possible to have 75ohm impedence without transformer ?
I do agree that digital cables make a difference and jitter is the culprit.

I think AES/EBU is a superior interface to co-ax. At least in my experience.

Well, I never believed that there could be differences between digital cables - strictly ones and ohhs. But then I thought about it and realized that there's a significant difference between the sound of coax and toslink in my system. Hmmm - still ones and 0's but the cable DOES make a difference afterall.

I just ordered the famous Stereovox digital cable from Cable Company and fully expect it to tighten up the sound from the Monster Cable coax cable I'm using. Hopefully it will be good enough for 2 channel music, as even the Monster Cable isn't all that bad.

Just got the Stereovox, and there's really a night and day difference. The Monsters are warmer but details are lost and smeared - not bad for music listening, but they were just a bit too euphonic. The Stereovox (burnt in by the Cable Co) have excellent detail, depth, soundstage, imaging, etc., but not without its faults either. They can sound bright and edgy and digital sounding.

As it is, I'll probably keep both, using the Monster for older brighter soundtracks. But for incredible steering, imaging and surround effects on good soundtracks, I'll keep the Stereovox. And for music, I'll just keep using analog interconnects.

So digital cables sound pretty much the same? To my ears the difference is as dramatic as any interconnect I've used. In fact they're almost polar opposites of each other soundwise. As if each parameter is on the opposite end of the same spectrum.

Hmm, anyway I'm now a confirmed believer though I can't help being a little disappointed by the Stereovox's after all the hype ("most amazing deal in audio - ever" etc.). I'm hoping the Cable Co just didn't cook them long enough or something, since the bright digital sound I'm hearing sounds a lot like analog cables that aren't fully broken in. We'll see.