When comparing WordPress vs Drupal, the Slant community recommends Drupal for most people. In the question“What is the best PHP CMS?” Drupal is ranked 6th while WordPress is ranked 9th. The most important reason people chose Drupal is:
Drupal is stable, with powerful version control and access control methods and can handle large amounts of traffic.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Complete control if needed
If you set up WP on your own server, you can change every single aspect of it as you see fit.
Pro Widely used
According to some statistics, WP powers a fifth of the Internet. It means there are resources for everything. Community support, tutorials, extensions and a plethora of customization options.
Pro Self-host & WP-host options
For free WordPress can be hosted by yourself on your own server, or as a subdomain of wordpress.com. You can also pay to use a custom domain with WP hosting.
Pro Open source
Anyone can view the code of WordPress since it's under a libre/open source license.
Pro RSS feeds for everything
Including tags and categories.
Pro Post-level privacy controls
Each post can have a different access level.
Pro Great for enterprise use
Drupal is stable, with powerful version control and access control methods and can handle large amounts of traffic.
Pro Free and open source
Drupal is free to use and open source.
Pro Active community
Drupal have one of biggest and more active communities across FOSS, maintaining a large and vibrant ecosystem of extensions and installation profiles.
Pro Great templating engine
Twig is a game changer!
Pro Multi-lingual support
Starting with Drupal 8, there's built-in multi-lingual support.
Pro It's easy to transfer config changes from dev to production
Pro Highly customizable
Drupal can be customized to do almost anything. It was built ground up with the intent of using a wide variety of small modules to get the exact result wanted instead of just the most common solutions.
Pro RESTful
Drupal 8 has REST services built in.
Pro Good accessibility
Pro Drupal has full SEO capabilities
(vs Joomla, which lacks SEO capabilities), there is an essential issue for promotion.
Pro Semantic HTML5
Pro Excellent SEO
Drupal was designed from the beginning to follow best practices in regards to SEO.
Pro Responsive front-end and back-end
Drupal 8 follows responsive design philosophy out of the box, both front-end and back-end.
Pro Drupal 8 and higher leverage composer and all of the wonderful PHP packages. Instead of building functionality from scratch, it utilizes existing libraries
Cons
Con A bit of bloat and complexity
WP has grown past being just a blogging platform and as such it's not as lightweight as it used to be. It also considerably more complex due to many more customization options compared to other solutions.
Con Dated
The code is a mess, uses dated conventions, and relies on dated technology.
Con Steep learning curve
Drupal is not easy to get into and out of the box doesn't offer much. To get Drupal doing what you want it to, modules are required. To get modules, an understanding of how Drupal works is required. And that takes time.
Con High resource consumption
A more complex Dupal installation can easily exhaust 256 MB of RAM with only one or two visitors.
Con Documentation is a joke
With currently 3 different version of drupal in active use, and at that constantly changing capibilities within 2 of those, it means that when you look for documentation is if often for a different version that you are running and in addition is not at all easy to consume. Often the info you need is in comment #100 of a thread.
Con Lacks good free modules and themes
Most good third-party modules and themes are costly.