Not neccessarily. I upgraded from Sisoft Sandra 2000 Professional to the Millennium edition using the Webupdate Wizard or something within the program, and now it says its the Millnnium edition, but the comparison reference systems are still the same as Sandra 2000 Pro. Worst thing is, no FPU memory benchmarks are given for any of the reference systems now.
Looks like you need to actually buy the new version rather than upgrade an old version to it, which sux!