Actually, both CMS are really good. They have their own advantage and disadvantage. Either you use Joomla or Drupal you can make a good web. It's up to your experience that you had with which one, then use that one. The best way to find out which one is right for you, would be to test them both to see which one you prefer. But for those who does not practice a test, we give a basic comparison of the both CMS. Hope this comparison will guide you to choose the right one.