At first glance they seem to be pretty similar:
- `QmitkPointListView` is used inside `QmitkPointListWidget` (used inside `QmitkPointSetInteractionView`)
- `QmitkPointListViewWidget` is used inside `ClassificationSegmentation`
From what I see `QmitkPointListViewWidget` inside the `ClassificationSegmentation`-class is not used: The member variable `QmitkPointListViewWidget * m_PointListWidget` is commented in the cpp-file and thus the class is not used here.