d06608a5__Drupal___Which_CMS_is_better___Drupal
[Features] Access Control List [Joomla] Joomla has only 3 user levels and 7 user groups. [Drupal] 
In Drupal, user can create unlimited user level s, roles, users groups and set permissions.
Joomla vs Drupal – Which CMS is better?
Drupal