Re: what is better
This is a REALLY tough decision, especially with Penryn and Phenom on the horizon and it's a big unknown as to what we can expect from those.
The Black Edition has got to be the last of the K8 architecture so it's pushing the limits. It's highly overclockable but be aware the CPU does not come with a cooler. You have to buy extra heatsink/fan combo for it, even retail.
Technically, that AMD CPU performs faster than the Intel version, power consumption on both is quite different. To me, the Intel has got to be better because it runs cooler and more efficient due to it's smaller design. Increase performance while decrease power consumption. There can be an OC potential too when you look at it that way.
*Fact: Microsoft Window's Blue Screen of Death vs Computerforums.org's White Screen of Death. Which is worse?