It depends on what you plan on doing with it as to which one is a better performer. Generally speaking, AMD performs better for gaming and Intel performs better at multimedia tasks.
Personally, with a choice between those two, I would go AMD, simply because it would (likely) be cheaper.
I'm sure if you look hard enough you could find some benchmark scores.
Intel P4 2.4B, MSI 645E Max-U Mobo, 1GB DDR333, ATI R9800PRO 128MB, TT PurePower 420W, SB Live 5.1, Samsung 120GB, Maxtor 120GB, LG DVD+-R/RW, WIN2K PRO SP4