Great! Glad that helped.
They both have their pros and cons. And I would say they're really only better fits for certain situations, one is not necessarily generally better than the other.
The Apple adapter is simple and acts just like another computer display. It's cheap and usually gets the job done in regular presentation environments and smaller production environments.
The Ultrastudio solution is great for incorporating graphics and playback into production environments and for situations where you need to distribute the signal to a lot of places over long distances. But it comes with "gotchas" like it won't work as a regular computer display and won't allow HDCP-encrypted content to play through the outputs.
For most temporary setups like the conference you mentioned then the Apple adapter will work just fine.