Biggest differentiator being that back then most CPU's were single core - one of the first dual core CPUs was the Pentium D that only came out in 2005 iirc.
Back then having a "Dual Core" of "Quad Core" processor was such a selling point, I remember getting my first Macbook (white plastic one) thinking it was a beast for having a Core2 Duo. Then like a year later, my Android phone had a quad core processor inside.
> Both AMD and Intel appear to be playing release date games with their latest dual core processors.
> Intel's affordable dual core desktop solution, the new Pentium D, officially launched in the middle of last month, but has yet to be seen in the channel.