As you asked for some pictures of the newer model with integrated USB, here they are. Looks like some minor changes in the main PCB, and an additional opto coupler and an additional cp2102. And they also changed the transformer brand.
Btw, their update-tool sucks, because it
a) forces you to install the complete driver packages, even if the driver was already set up correctly before.
b) contains all firmware images for all stations, so you always need to download a new >300Mb package for updating your single station. No possibility to just download the one needed file from within the application.