Ultimate Outlet 1 vs. 2 for Mono amps

Has anyone compared the use of 1 high current PS Audio UO vs 2 when using mono amps. I have Rogue 120's. Probably dependent on equipment. Thanks
I have done various testing along the line of outlets (regular v. cryo'd); various wire for dedicated AC lines, equipment operating from one dedicated line and outlet v. two etc. I think you are correct, it depends upon the various brand names and individual specifications of equipment.