For yesterday, shop stats says that I received a total of 20 views and 2 favorites. When I checked who favorited in my activity feed, there was only 1 from yesterday. When I checked google it said I had 49 pageviews and 10 visits. The numbers don't match at all.
I've also noticed this but unfortunately I do not know which is more accurate. I tend to use my google analytics stats over the Etsy shop stats though.
I usually just pick ONE to look at and compare it on a day to day basis. I figure, if I'm doing better, even if it's not 100% accurate, I'm heading in the right direction. Super confusing though, I agree