What is the difference between the "Cabinotch" and "Cabinotch Overlay" Libraries in KCD?

Inside of the "Cabinotch" Library, KCD gives reference for the "Door Lip", this is for applying a "Standard" overlay for all of your cabinet doors and drawer fronts.

For example, a "Door Lip" of 1/2inch would be appropriate for a 1/2" Overlay across the entire job.

You may also choice to make this "Door Lip" a negative value in order to setup for an Inset application. For example a "Door Lip" of -.125" or -.1875" would be appropriate for Inset Doors and Drawer Fronts.

By utilizing the "Cabinotch Overlay" Library, you can manipulate the "Reveals" on ALL edges of the framed openings. This would allow you to setup for more custom door overlays.