What is the difference between ActualWindowRectChanged and WindowRectChanged?

Hi all,

I have two or more charts on the same page and I want to sync them at the same x value when the user pan left/right or zoom in/out.

If I use ActualWindowRectChanged the result is correct. But what is the difference between these two public events ActualWindowRectChanged and WindowRectChanged on Xamarin Forms?

Thank you for your support.