I am using those exact cables (3 pairs stereo) for my SACD player. No complaints.
I doubt there would be any sonic difference if you used 2 pairs of component cables instead, but I don't actually know. As you say, they're the same cables with different colored connectors.
What I do know is that it's cheaper to use 3 pairs of 2-channel audio and that using Component video cables will leave you with 'non-standard' colored connections. Instead of Red/White or Red/Black, you're going to have Red/Green/Blue to Red/White pairs. I am OCD enough about cables that it would drive me nuts.
Oh, FYI: Watch that link. The component cables you are linked to are actually *FIVE* cable sets. R/G/B for video and then R/W for audio, all bundled together. Scroll down on the page. I think what you're looking for is
this. 
