Metasearch engine Dogpile.com has redesigned its site to allow users to compare search results across search engines as it seeks to emphasize the benefits of metasearch to web users, writes DM News. It plans to increase spending on online marketing this year to promote the metasearch concept. Dogpile also released the results of a study showing that there is only a three percent overlap among the results returned on the first pages by Google, Yahoo and Ask Jeeves. Last month, Dogpile parent InfoSpace signed a two-year deal to add search results from MSN Search to Dogpile's metasearch offering. Dogpile.com will become the only metasearch site that compiles results from all four leading search engines.