WordPress and Drupal are both good web applications. They’re growing in popularity every day and continually worked on for further improvements.
WordPress, although it can be manipulated into something entirely different, is primarily made for blogging. As a freelancer, I like it because it’s easy for my clients to grasp when I issue them an account they can log in and manage their content with. As a theme developer, I like it because it’s easy to modify the output (the code that the brower translates into a page). Moreover, the administrator can edit the theme right within WordPress, bypassing the need to FTP files to the server (this works for me since I work in straight code anyway). Plug-ins (what you call WordPress’s add-ons) can also be edited from within WordPress. Another big plus is how easy it is to install any of the plethora of themes and plug-ins available at wordpress.org, built by other WordPress developers. No need to FTP them either— just browse them from within WordPress and click “Install”.
Drupal is primarily a content management system and a very flexible one at that. It comes loaded with features that can be turned on such as comments, a contact form page, even a forum. You can easily turn these features off if you don’t need them, so they won’t take up any load time. User management is extremely detailed. The modules (what you call Drupal’s add-ons) submitted to the Drupal website by contributors are monitored and only published if they pass certain standards, so there aren’t so many to sift through to find the right ones for your needs. Drupal is very logically organized all around, not just in a way that is ideal for blogging.
Now reverse all those positive comments to negative and reverse which application I was referring to in each. In other words, the good things I mentioned above about WordPress, Drupal lacks and vise versa. They can be made to come very close, but you have to put the time and work into finding the right add-ons and installing them in order to acheive this.
The moral is, use the application that works best for your website needs. No web application is perfect or better than all the rest. It just depends on what you need the website to do. For blogging, I highly recommend WordPress. For content and/or user management or anything as complicated as a shopping cart or more, I recommend Drupal.
