Differences in electric outlets

The price?

hospital grade has more to do with the bite of the chord or how well in hold on to the plug. other outlets like ps audio are coated with better metal and are isolated better yes the are more expensive but there is a signifigant difference

Here is just one thread posted on AA . Volumes of posts on AA regarding electrical receptacles. Just do a search for more info.

The oyaide R1 is all the rave at the present time