Well Intel and AMD are completely different. Same with the cores. You cant compare a Prescott core with a Clawhammer core, just the type of processor. For example, a AMD 4000 Clawhammer is better then a 2.4ghz P4 Prescott. Thats because the processor itself is better.
The 4000 is of course better then the 3.4 prescott. I mean ALOT better then the prescott. Same with the 3800 clawhammer. You cant compare a 4000 to a 3.4, for the simple fact that the 3.4 is just out of the league.
If you can afford a AMD64 3800 or a 4000, then grab that sucker. Those processor are top-line. Processor dont get much better.
Finished With TF.