In a recent story on National Public Radio, a speaker discussed the results of comparing search engines Bing and Google.  He used a program called Bing-vs-Google.  After a week of searching for an article he was preparing, he thought there were gaps in the Bing results, but that Bing may offer more opportunities for shopping online.  You can run your own test.  Enter your search terms in the search box.  The default display shows the results side-by-side or you can show the results horizontally.  Give it a try.