Both are very equally popular CMS out there. They both have a dedicated and very active user community to help you out in case of any needs with development or design regarding the system. When the CMSs are analyzed, one can see it that the Drupal can be easily maintained and improved from the developer perspective. The Joomla has much of a design oriented perspective active in it. You can easily get the desired layout and customize the template style within the Joomla easily with many readily available designs. It is still a subjective choice and it depends on your requirements.