Like all things: It depends. Wordpress is by far most popular and if you're looking for ready to use plugins themes etc. , you'll find them on Wordpress first, but it popularity comes at a price - if you do not secure it your site WILL get hacked sooner than later. Drupal is a little less user friendly, but has great functionality for developers built in: for example Views: that in wordpress you would have to pay for (like ACF pro)