I've got to agree 100% with Fahrvenugen's assessment (I've run both - and others).
We run a variety of Wordpress sites... some blogs only (like mine at blog.robertmauro.com), some (not yet enabled on the main domain) as "full websites" such as blogtest.robertmauro.com which will be a replacement for
www.solfeet.comIn the second example, we've set up pages (which are still constrained by the theme(s) installed) for the main website content and direct all the blog posts to the "Blogs" link. It's kinda clumsy on the initial setup, and I have a few different mods installed, but it works.
The easiest I've used for website creation is Typo/2 (or is it Typo/3?). But it's horrendous as a blog. For website stuff though, it's far easier if you are setting up a site for a customer to update than say Joomla. Much less of a learning curve.
In any event (ie: whatever you choose), look into the various plugins and such available to add greater functionality. In this, Wordpress and Joomla (and probably Drupal) have tons... not so many for the other options out there.
Related note: virtually anything that's pure Apache/PHP/MySQL driven should work fine on OS/2 and eComStation. There are some (quite a few maybe?) that require custom DLLs or some other such support code that's OS specific - but it's usually pretty easy to figure out which is which based on their system requirements. If it lists only AMP as a requirement, regardless of OS, it should probably work. And for most situations, you can follow the Linux known restrictions section (as opposed to the Windows/IIS or Windows/Apache restrictions).
Best,
Robert