Extract: "What Changed After 8 Months? We ran the previous Google AdWords campaigns again, using the same keywords, the same ad copy, the same domain names, and even the same landing pages. Again, the only difference between the campaigns was the domain name. We focused our testing efforts this time on refreshing the previous test, which was www.3CaratDiamonds.com versus www.3Carat.Diamonds. And boy did we get some interesting data this time. Here’s a quick outline of what we learned from our updated testing".