The algorithms of Google and Bing are different I think. Google is the best search engine and it has a long successful history whereas the Bing's algorithms is new compared to Google.
bing is focus on the backlinks yahoo is focus on the contents google has many many factors ( PR, backlinks, unique contents, on-page seo, anti-spam )
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Google give you more traffic then any other search engine either its bing or yahoo so everyone chase google to get high rank.