It's quite typical to see Seti WUs vary 20% in process times, so you need to stick with an overall average or run a Seti benchmark WU. I think that ARS Technica's website has a benchmark WU that you can run, along with a comparison database. They did not have much info the last time that I looked on the new ver. 3.03 clients, but that has probably changed by now.
If you folks aren't on a team yet, we would love to have you. Great stats and fellowship are right here!
viz