QQmlApplicationEngine is a class from the Qt Toolkit which provides a convenient way to load an application from a single QML file.
In the QT framework, the QQuickView class provides a window for displaying a Qt Quick user interface.
Headline newer powerful
"Headline qqmlapplicationengine is newer and more powerful than qquickview"
What is the difference between QQmlApplicationEngine and QQuickView?
"Since qqmlapplicationengine is newer than qquickview one would naturally assume that it is more powerful"
X11VNC performance - QQuickView vs QQmlApplicationEngine