As rolli59 said, you need to list the 2 CPUs, An Intel 2 core COULD be faster and better PER PROCESS than the 6 core. But the 6 core will obviously has more threads running at once, just because it's a 6 core CPU.
Note: I'm guessing you're buying the AMD Phenom II x6 1055T? In my opinion, just add 30 dollars for the 1100T Black edition