Search engines differ from one another in a few different ways. One way that search engines are different is the way they offer search information. Some use the 'internet bubble' method because the information is tailored specifically to you. On the other hand, others have the 'no bias' in search results, and gives you information only related to the keywords or phrases you search for and does not factor in your interests. Search engines also differ in the content they index. Some search engines only index one or a few websites and nothing more (such as an integrated search engine). To learn more about search engines, how they work, and how they are different, visit: http://www.ask.com/wiki/Web_search_engine.
Search engines may differ from each other depending on what type of search engine it is. Some search engines are specially design to search for a specific type of information needed by their users. Some examples of different types of search engines are www.google.com, www.dictionary.com and www.recipe.com.