MRI grade vs Hospital grade electric outlets


I know both have been suggested as an upgrade to the run of the mill cheap outlets. I also know there may be "even better" outlets.   I know the MRI grade has non magnetic metal components. Bottom line, does it make a difference one can hear? I have about 1/2 dozen Hubbell 30 Watt hospital grade outlets. Got them fairly inexpensively. Are the MRI grade worth the extra $$$?
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@kavakat1,

Does it look this this?
https://picclick.com/Hubbell-HBL8300W-Duplex-Receptacle-NEMA-5-20R-125v-20-182320546258.html#&gi...
Note the tapped 6/32 square brass hub in the center of the outlet for mounting the duplex cover plate. Is yours square?

Looking at the side view of the outlet in the picture does it look like yours?

If so it should be an old series HBL8300 hospital grade duplex receptacle with a nickel plated brass back strap. You can find out for sure if you have a magnet. If it is nickel plated brass you should/might, (depending on the strength of the magnet), feel a slight pulling attraction to the magnet. If it is the newer style HBL8300 hospital grade outlet, that has a steel back strap, the magnet will stick like glue to the back strap.

.

Again here is the new style HBL8300 hospital grade with galvanized steel supporting back strap.
http://ecatalog.hubbell-wiring.com/productinformation/specsheets/3A/Live/PDF/HBL8300H_cart.pdf
Note the brass center 6/32 hub for supporting the duplex cover plate is round, not square.







ITS ELECTRICITY THAT COMES FROM AN OUTLET,NOT SOUND.
Contact pressure is the primary difference between good and bad outlets.
You can believe the hype,I'll put my money on more music buying, that's why I buy my equipment.