I wrote all of this beacuse I have experience with both of Joomla and WordPress. And WordPress is much, much easier when you want to write a blog, and there is much more SEO friendly addons. When I was using Joomla it was great (but not so easy to use) for ecommerce purpose, but when it comes to blogging - it was a nightmare! In example - there was a problem with proper meta descriptions.
But - it's just only my opinion, Steve