Perhaps comparing search engine results is just a bit too technology specific for PI News Link. I’ll keep it short. Internet nerd compares top 3 search engines with become.com for unique search results. The conclusion? The top 3 are much the same but become.com delivered the most unique urls for the keywords searched. This is not a general search engine but a product and product review one.
If a url was found within the search results of a single search engine [engine A] but the url didn’t exist in the top 10 results of either one of the other engines [engines B, C & D] then that url was considered unique for the search engine in which it was found [engine A]. Read the article