Intel
Pro's: Quiet. Efficiant. Stock Speed: the highest out there. Will not toast itself if the fan isn't seated properly.
Cons's: AMD's AthlonXP 2000+(1.66ghz) is just as fast in certain applications. Costs half as much. Games much better.

AMD
Pro's: The AthlonXP 2000+(1.66GHz) is about as fast as the higher rated Intel 2.2 GHz. Games very well. Cost much less.
Cons: LOUD. Bit slower than the Intel's in certain applications. Not as overclockable. Takes just seconds to have one go up in smoke if you don't have your screamin' fan on properly.

IMO

Sweeper