It’s a rather strange comparison as neither seem to effectively track stats. Before the coffeecommander fixed my site to take me off his wordpress login, I was using W3Counter and was plenty happy with it. Good info, maybe a bit more than I wanted available, but seemed to work properly.
After the fix, I installed WordPress Stats, and just left W3 on for the time being, as I’d rather not look at a naked tracker. Plus, I’m lazy. Lately I’ve noticed that they both seem to count traffic differently. Or rather, it seems that some traffic is caught by one, some by the other and some overlap.
Perhaps this is an error on my part for having them both installed, but it seems to me that they should both count the same traffic. I’d hate to remove W3, only to find that I’m only seeing part of what I should. I hope that is what it is. I’ll have to look into it.
Oh ya, back to the topic, WPStats shows basic info. Search terms, top posts, referrers and view stats. And their traffic graph works from the dashboard.
W3 shows all time traffic stats, 7 day traffic, top posts, top searches, top referrers and location within the dashboard. There is also a spot for a graph that never worked for me. From the W3 site, there’s more info then anyone should need, and even more available with a subscription.