For this I took a look at https://www.google.com/search?q=difference+between+XML+and+XAML and found many explanations.
One of your new tools today are search engines for many questions since you can pick the explanation you understand.
-> Be aware that this is not Quora where you score points for asking a new question. Once in a while we get a new member that thinks this is Quora.
What is the difference between XML and XAML?