Drupal is normally regarded as the more powerful one. I have not used Drupal 7 but generally speaking Drupal is regarded as a very hard CMS to use from a development standpoint. Asking whats the best, easiest CMS is a tricky question. More features and more ability always comes with more complication and a higher learning curve. The ease of use also varies with what you want to do with it, what are your intentions with it?
Threaded Mode
Forum Contains New Posts 
Forum Contains No New Posts 
Forum is Closed