Intel P4 tend to perform its best on media apps and some benchmarks that have been custom tailored for it. More precicely
exactly those benchmarks *carefully* selected and used by tomshardware.com, and not much else.
(Which is one reason why you shouldn't trust tomshardware. Another reason you shouldn't trust them is because they are not satisfied with the selection alone, they also cheat some when benchmarking. A third reason you shouldn't trust them is because their general manager have a 'peculiar personality'. You can check it out here, in this unmasked (after a beer too many?) rant:
http://www.tgdaily.com/2004/02/18/intel/
I believe it's a case of what is generally called
"Intelfanboy"? Is it not?
Note the immature, childish gloating.
A fourth reason is that you will find there is a whole crowd that will tell you "don't trust tomshardware.com". Their reputation is one of bias, dishonesty, incompetence.)
Intel P4 perform solid on anything modern concerned with media. Particularly video.
And the top P4s have the advantage of ht, which allows Windows to shedule it two threads, avoiding some blockages.
(Still, a good trick to inflate Intel's performance vs AMD on videoencoding is to drop audio and lower quality. Not relevant to real performance perhaps, but useful if one wants to slant a benchmark.)
Intel P4 perform remarkably poorly (compared to AMD) on code that has been little or not at all optimized specifically for the P4 architecture. That happens to be a lot of real software. But there have been no such benchmarks since the days of the Willamette, so this is not a fact that is much present in peoples awareness today. (The Northwood core got an awful lot of credit for "improvements" that were partly due to changed benchmarks.)
But this may be part of the background to the saying that "AMD is faster in real use".
A more quantified and verified example of this proverb is this spectacular test on Extremetech that successfully demonstrates that the real use superiority of AMD goes far beyond what the figures of an even honest benchmark would indicate.
http://www.extremetech.com/article2/0,1697,1854788,00.asp
It's hard to rekommend Intel these days. AMD is cheaper, faster, cooler and far less trouble and problems.
When it comes to Intel, wait for Intel's Conroe (P5?). Don't buy their sh**ty P4.