At stock speed, an FX-57 or P4EE might be a little bit faster. Here's a side-by-side of 3.6ghz P4 660 against a 2ghz Celeron 440... that's the closest comparison I can find. Keep in mind when looking at those results, most of those benchmarks are multithreaded, and the Celeron still puts up a pretty good showing... the difference for your purposes will be much smaller, since there's not going to be any multithreading going on.
The trick, though, is that it's pretty trivial to ramp those Celerons up to ~3ghz... usually doesn't even need any extra voltage or cooling. At that speed, the Celeron is most certainly going to wipe the floor with a P4 or A64.