Please try to stop worrying about power cables.
As long as it is thick enough any power cable does the same job as any other.
Remember the last 6 feet of cable joining your power outlet to your equipment follows miles (literally) of cabling that you mostly don't own. Your house wiring, the power company fuse (yes all your power has to go through this fuse that you cannot replace), the street wiring back to the 8kV (in the UK) transformer, the supply to that which runs miles probably on pylons, subject to atmospheric and other interference, back to the power station (or windmill).
So how can the last 6 feet countervail all of that?