Webmark2001 was run under Windows 2000 Professional. It is supposed to test the 'Internet-performance' of a computer system, whatever that actually means.
In Webmark2001, Intel's Pentium 4 is able to shine in a complete different light than in Sysmark2000. Still the Power Box is able to beat the Pentium 4 system here.
The Business-To-Business portion of Webmark2001 shows all systems much closer together, simply because the processor doesn't have as much of an impact on the scores. Still the Power Box is the leader.