Now what is the difference? The difference lies in the way both these websites search mechanism works. Google™ uses an algorithm where its spider crawler searches through its vast and extensive database to find the website. And del.icio.us™ uses tags that have been assigned with the links by this users and it also gives us a rating mechanism wherein we can see which page have been rated the highest in terms of usage.
But aren’t we looking for a specific webpage rather than website? That’s why I believe that search through del.icio.us™ is a better proposition altogether than google when the question is about finding relevant webpage.