PDF-Flattened takes your Concepts drawing and flattens it into a high-resolution file that can be seen but not edited as a PDF.
 
PDF-Vector Paths packages your vector data so that it can be read and edited by other PDF-editable applications like Adobe Illustrator.
 
Please note that other applications cannot read the textured vector strokes Concepts specializes in, so your strokes will be simplified to contain only the basic vector path data. Your drawing will appear quite different than your original. If export to other vector-based apps is your intent, draw with the Fixed Width and Wire tools.
 
The Hard and Soft Masks are not supported by other apps. They will appear as white lines in your drawings. If you wish to export your PDF for editing elsewhere, use the Slice tool to edit and erase your line work in Concepts.