Different package, different results

But why is the difference so big?

[markbaa]

Hi All

I recently switched from Sawmill to Webtrends (a slightly older version - 6.0 I think).

I've had enough experience with stats packages to know that different ones measure things differently, and understand there are many ways to skin a cat. However, this one is pretty extreme.

For the same period (March), Sawmill reported 562,575 for one site, but Webtrends, using the same logs, reported 381,842. That's a pretty enormous difference.

Can anyone offer any hints as to why there's such a vast difference? If it makes a difference, this site is visited very regularly by a relatively small number of people (a few thousand), most view it several times a week.

[gregbo]

What do those numbers correspond to? Hits? Pageviews? Do you know offhand how each package was configured for identifying crawlers?