They're all 133Mhz FSB, but around the same speed.
I find <A HREF="http://www.geek.com/procspec/procspec.htm" target="_new">This</A> site fairly useful, but I've seen a couple of innacuracies there in the past, so I wouldn't necessarily trust it completely.
[EDIT]Oh, and I think their specs for XP-M are a little incomplete[/EDIT]
<font color=red>"Life is <i>not</i> like a box of chocolates. It's more like a jar of jalapeńos - what you do today might burn your a<b></b>ss tommorrow."<P ID="edit"><FONT SIZE=-1><EM>Edited by ChipDeath on 08/26/05 05:20 PM.</EM></FONT></P>