I think the Cane Corso was too young for this test.
They said the Mal was very social so it was not surprising that just anybody can walk into his house. Being overly social seems to be a problem with herding breeds these days.
The German Shepherd was from a rescue, most likely neutered, but for looking like some type show line mix and being fixed, not really all that bad of a performance with all things considered.
Insofar as a threat, it is almost always the passive person who is a threat IME. The loud and agitated person is usually a harmless drunk or a physically / mentally incapacitated person. I am not sure why anybody would view a stranger entering one's home uninvited as a non threat.
If you need equipment to maintain control of your dog, understand you’re hanging on to your dog’s body because you’ve lost his mind!