InterGuard is the leader in Data Loss Prevention software. You will be able to view and block sensitive data from leaving via email, web forms and removable media usb secure as well as data saved on local drives (even remote laptops). Policies you can easily customize via a wizard based on the user, computer or type of data.
For a security tester, you want something that highlights the vulnerability in a clear way, and causes no damage (or at least as little as possible consistent with finding the vulnerability). If I’m testing whether people will plug in random USB sticks, plugging protect usb it in should either report the information to me (probably using the 5V to power a transmitter, rather than trying to rely on a network connection that might not be there), or announces its presence to everyone nearby (how loud a siren can you power via USB?).
The link you gave is a bunch of unrelated stuff thrown together. The few that are EAL7 are for the Fox Data Diode. A data diode lets data flow in one direction. The Fox Data Diode does this for optical Ethernet. It doesn’t support two-way computation or USB devices, so it’s not relevant in a discussion of USB. There’s no usb secure product evaluated to EAL7 that I’m aware of.