Google Analytics vs Sedo Cashparking visitors — which is correct?

Hi guys. Following the advice of several of you, I redirected almost all of my domains to cashparking. I had initially pointed them directly to my WLM where I was monitoring analytics.

Oddly, since the switch, my parking statistics couldn’t be anymore different. Some domains got huge numbers of visitors initially (who typically bounced), but now it’s a whole new set of domains with activity. (The original performers now appear to be duds.)

Any idea why there’s such a big discrepancy between the two? And who would you trust more — parking provider, or Google analytics? Thanks!