Isolated ground versus self ground outlet

The type of ground was answered.
Now what are you asking? A four outlet receptacle as in a single quadplex type vs. using a pair of duplex outlets? Or running a line and installing a box that allows you to run 4 outlets as opposed to running a single or a duplex?
Lost here in all the ambiguity…

For the outlet recommendation I posted on your other thread recommending Furutech. For a 4 outlet run you can combine a gold plated and rhodium plated…compare them, or run amps off rhodium and source off gold, or the other way around, or even combine different brand duplex outlets…gives you flexibility.

@mitch2

So, if you use plastic outlet boxes and dedicated lines with hot/neutral/ground wires, you have in effect isolated your ground regardless of the outlet used, correct?

...yes, as long as you use Romex or NM (non-metallic) sheathed electrical cable to connect them to the load center.