OK, first, I'd like to point out a few things before I answer your question:
Amd has gone 64-bit whoopy doo Intel has matched that with there 32-bit processor all they have todo is change to 64-bit and it's settled the gap will be closed.
But they didn't; they were almost two years behind AMD in releasing a similar platform. And if you knew the advantages of 64 bit over 32, you wouldn't make an uninformed statement like that.
By the way, I read those two articles. The first gives the crown to AMD by a good sized margin, especially in gaming, and the second compares an unreleased processor with something totally uncomparable. That's not fair.
Anyways, in gaming, the dual core would probably outperform the P4, just because it is more efficent.