The second ad is more "entertaining" in my opinion. Also "Ad Blinded-ness" might have caused the first ad to just go unnoticed among all the other ads. Being untypical helps on the web. But also, the point is that you cannot expect patterns to predict success always. The first ad was based on a pattern. Now, if we study the second ad for a pattern it might not work as well. Man, I love the web for this.