Interesting post appeared on BlogStorm:

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According to this interview with Marissa Mayer Google doesn’t let third parties such as AOL and Myspace alter the search results they syndicate from Google.

We work very hard on our ranking functions. As a result, our search licensing agreements explicitly prohibit reranking results. A lot of the value our partners pay for is in the ranked list of search results, so we suggest they don’t rerank it. We welcome developers adding things to the UI to make search more useful. Because the ranking remains one of the core aspects of our business, we have as part of our Terms of Service that they not reorder results. The Google brand stands for excellence in relevance and ranking, so we don’t want to provide a co-branded product where it doesn’t reflect our best ranking.

If that’s really the case why does this result differ so much to this result?

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  In response to BlogStorm I would like to say that Google has hundreds datacenters which collect information and rank websites. Each datacenter has little different information about each website, for example new links which appeared for website could be indexed by one datacenter and not discovered yet by another. This situation creates different results in each datacenter. Every month Google updates information for each datacenter.

  Different results between AOL and Google search could appear because they could show information from different datacenters. In fact, for each country and region Google (even if it is Google.com) can show little different results. Often it doesn’t affect average results for particular website.