Card Parts are used for FactBoxes that don't require a list. Card Parts display fields or perhaps a picture control. (Business Central Help contains an example of including a .NET add-in within a FactBox to display a chart). An example of the Customer Statistics FactBox (page 9,082—Customer Statistics Factbox) is shown in the following screenshot:
List Parts are used for FactBoxes that require a list. A list is defined as columns of repeated data. No more than two or three columns should appear in a FactBox list. The following screenshot shows the three column My Items FactBox List Part (page 9,152):
