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.