The RadListView and the RadDataboundListBox don't seem to have the same features - the DataBoundListBox supports a "Masonry View" using:
Defining the Stack Count
Depending on the wrapping orientation, items will be ordered in columns or rows. You can choose how many columns or rows will be created by setting the StackCount property exposed by the DynamicGridVirtualizationStrategyDefinition class. For example, if the Orientation is set to be Horizontal and the StackCount is set to 3, you will get a result similar to the following:
I don't see the same features on the RadListBox.