In this chart from: www.alledia.com we can see that both projects have moved forward but neither one has really changed to much it's own goals.
* Joomla is still more user-friendly with a more active developer and designer community, but less extensible and documentated
* Drupal is absolutely more Open (GPL like), still more flexible and developer-friendly with a more coherent and stable community. More developers work for the community benefit not only for themselves.
Two major point for choosing Drupal is the Ubercart for shopping cart module and the advanced CCK!