I like Drupal better than Joomla. Joomla indexes poorly in searches. At least that's my experience. People do great things with it but I just don't care for it.

If your host has fantastico, you can download each of them if you have two mysql databases and see which one you like. Manipulating the theme can get hairy with php. So it's best to start with a template where the layout of elements is the way you like, then work from there.

If you do download both, make sure they go in separate folders.