Microsoft's stance on search engine optimization really doesn't appear to be all that different from Google's. You're not going to get the same results on both Google and Bing in many cases, but that is after all why the two can co-exist. The real difference is in how the results are presented, and not as much in how the two determine quality and relevancy. Bing and Google have separate algorithms, but both like quality, relevant links and good content, as opposed to deception and spam. Bing in fact, hasn't really changed much (from Live Search) in terms of crawling.