This is not an opinion based question but rather a technical limits comparison one.
From the various comparison charts about the two CMS I couldn't really find any technical difference between the two platforms. Being a long time WordPress developer I find the supplied arguments about Typo3 technical pros exist somehow in WordPress; Everything you could achieve in one can be achieved in the other as well (plugins & extensions).
Let's take for example the latest versions of both two CMS's, what does Typo3 can do that WordPress can't even with its plugins/extensions?
UPDATE
Please instead of down voting the question, provide at least 1 reason for your vote.
As you write, the technical pros exist somehow in WordPress.
I personally think a major advantage of TYPO3 is the extension framework extbase and the template rendering engine fluid.
Developing (and maintaining) larger extensions becomes a lot easier since their introduction as well as an overall cleaner, fully object oriented code base.
3rd party extension written in that technology are easier to adapt/customize than some extensions in Wordpress which sometimes mix procedural with object oriented style.
Webpages with multiple languages are easier to handle in TYPO3 (e.g. content fallback), which makes it more interesting for bigger projects.
Take a look at the TYPO3 showcases and the Wordpress showcases, to me it looks like Wordpress is primarily used for subsites (like blogs, landingpages etc.) whereas TYPO3 is used more for corporate sites (which probably have a longer life cycle).