Pixel 9; So which is it? 80% or 90%

I just noticed this? https://photos.app.goo.gl/25PiQ2YFHcUdrHdV9

So if limit battery charge to 80% stop the phone from turning off battery saver at 90% Which is it?

Maybe I'm not expressing this right! Before the 80% charge limit was added to andriod, we would change to 100% at which 90% the phone would disable all power saving optimizations as you would expect, however if you if you limit the battery charge to 80%, power save mode never disengages and you're always in power save mode with it's limitations,. I don't know about you but if I'm fully charging my phone to full capacity (80 or 100%) when the phone is fully charged I don't want to still be in power saver mode.

Maybe it's just me!