Registering Singleton vs Context Property

Hey hey I have to pass settings from C++ code to QML , so I have two ways to go either using context     QtQuick2ApplicationViewer viewer;     WindowSettings windowSettings;     viewer.rootContext()->setContextProperty(QStringLiteral("settings"), &windowSettings); or like this qmlRegisterSingletonType<WindowSettings>(SETTINGS_URI, 1, 0, "Settings", settingsPovider); Just curious, what is the better approach?