What are the pros and cons of using Qt containers ( QMap , QVector , etc.) over their STL equivalent? I can see one reason to prefer Qt: Qt containers can be passed along to other parts of Qt. For example, they can be used to populate a QVariant and then a QSettings (with some limitation though, only QList and QMap / QHash whose keys are strings are accepted). Is there any other? Edit : Assuming the application already relies on Qt.

STL or Qt containers?

What are the pros and cons of using Qt containers (QMap, QVector, etc.) over their STL equivalent?

I can see one reason to prefer Qt:

Qt containers can be passed along to other parts of Qt. For example, they can be used to populate a QVariant and then a QSettings (with some limitation though, only QList and QMap/QHash whose keys are strings are accepted).

Is there any other?

Edit: Assuming the application already relies on Qt.