Calling Wordpress a framework is like calling Symfony a programming language.

Much like Drupal, WordPress can be bent into something vaguely resembling a framework, if you're the type of person who enjoys that sort of thing. But being the type of person who likes using WordPress as a general-purpose framework is sort of like being the type of person who enjoys being tied up and beaten with a rubber hose. It's a weird, weird kink.

Of the 2 I very much prefer Drupal. It's a bad CMS, but a great CMF. Wordpress is in my opinion the exact opposite.

That said, I haven't checked out the last 2 versions or so.