Drupal use smarty template where as on the other hand Joomla dose not Joomla uses plugin and modules whereas Drupal has module only In drupal php code can be written directly whereas in Joomla you need to install plugin for php support Drupal is SEO Friendly whereas in Joomla you need to buy a plugin.
Drupal use smarty where as Joomla use his own code format.
In Druapl we can create multiple website with single installation.