Hospital grade receptacles are designated with a green dot. They can be ordered in a variety of colors. Yes, they are significantly tighter for both plugging in an unplugging, and the grounding is engaged and disengaged before the live or neutral contacts. I am not sure what the spec is, but due to the design and the firmer grip, they appear to have lower insertion loss.P.S.
I Googled "hospital grade" and it looks like the main thing is a spec for the amount of force required to pull it out so it's less likely to be accidently pulled out. And there was something about a "more reliable" ground connection. The red ones are connected to an uninterruptable power source. And, I think hospital grade plugs/cords can be pulled-out by the cord without damage,
The versions with the orange triangle or that are entirely orange have an isolated ground.