I don't know much about most of these, Bing is good for looking up porn just type in whatever you want and click videos and most of the time you can watch them right there without going to the actual site; I have DDG as my default search engine and for certain things I have to go to Google to get the results I'm looking for eg maps, a local business that shows its hours without having to click a link etc. I don't know about the rest.