How to compare w2k & w2k3 network performance?

Hi all,

We are thinking of switching from w2k server to windows server 2003. We
heard of some improved network performance. how can we measure this? (if
possible at all) Our first approach is to run netmon on the current w2k
traffic, and note the average server response time. Then we would do the same
after we installes w2k3 on the same hardware and compare the values.

Would this make sense? Has anyone found a better way to compare / measure
the network performance of the two OSs?

Regards,
Hadi