I wouldn’t be surprised if it varies by monitor but I’ve encountered plenty of monitors professionally where I could not tell the difference between the VGA or HDMI input, but I can absolutely tell when a user had one of the cheap adapters in the mix and generally make a point of trying to get those adapters out of production as much as possible because not only do they noticably fuck with the signal (most users don’t care but I can see it at least) but they also tend to fail and create unnecessary service calls