You forgot to add the second CPU. Not much point buy a dual CPU card and no CPUs. And the memory is more expensive. All in all, the Opteron is a faster and more expensive system. But it's a lot more bang for the buck.
And I was not comparing them, I just said the Opteron would be more expensive. I know for a fact which one would be most fun to me with AmigaOS, and it's not the Opteron. I just asked if you had actually TRIED one, not just talk about it. Like sex, you know. Those who talk most about it seldom get any ;-)
I know for a fact that some Cray machines are REALLY fast, but that doesn't mean I have to own one. It's more expensive, so I might not afford it ;-)
And making a pricewatch that compares Eyetech and Vesalia prices wouldn't excactly be any point since Vesalia buys the boards from Eyetech. You're not gonna see extreme differences unless Vesalia goes down and needs to recoup their losses or something :-P