The latest reports show Bing-powered searches now make up about 30 percent of all web searches. But if Bing’s market share comes in a distant second to Google’s, Microsoft’s search engine isn’t content to stay there. A revamped page design, new social features and a big partnership with Encyclopedia Britannica suggest Bing is itching to go glove-to-glove with search’s heavyweight. Both search engines have unveiled major changes to their design and function in 2012 as the battle for search supremacy continues. Check out our tale of the tape below to see how America’s top two search engines stack up.