Actually, both cms is really good. They have their own advantage and disadvantage. Either you use joomla or drupal you can make a good web. It's up to your experience that you had with which one, then use that one. If you never have used anyone, do some research in both about their pros and cons and choose the one you like.
But for the sake of this topic, I can say something about them. Many people say joomla is easier (to start) than drupal. Joomla has many modules installed as Drupal you have to install yourself and drupal needs more configurations than joomla. Drupal is harder but when you feel familiar with it you can feel it's easy, everything is designed for best use, and drupal is more scalable than joomla.