Difference between Component, Instantiator, Loader

[Ice_trooper]

What's the difference between those 3?
What should I use when I want to create different ApplicationWindows dynamically (when I click on a buttons on my main App window)? Should I pass url "qrc:/windows/SomeWindow.qml" or some object?

Imagine list of apps on main window and when I click on that button it opens different window (it's entirely custom window for every app, nothing is similar) for that app.