The Studio One cpu meter is showing something different from what the OS cpu meter shows, a different measurement, so they will rarely if ever match.
I'd personally suggest that you ignore them both until or unless audio playback is directly affected by lack of cpu resources, glitches, dropouts, etc, and when or of that happens perhaps try to stage a few things better like moving some built in instrument verbs to FX busses to help distribute the load better, or freezing cpu hungry plugins.