Much of the same basic info is displayed on an in-dash system. Both in-dash and portable systems allow you to choose what information is displayed. However, the larger screen allows the in-dash unit to display more information at the same time while you generally have to choose between data to display on the portable units. Both of the units tested display maps in both 2D and 3D. The 3D view is a cool look, but we found it easier to read the 2D map.