@Keith.Brown

straight to point...
In two sentence are explained every difference.

I have situation as
complete fertiliser plant is design in Plant3D, and now we have need for one or two duct systems, for air. We have more then 600 pipelines.
We had thoughts about integrate Autocad MEP as solution for design of ducts, but as I understand, still we need CADfabrication for detail design and manufacturing drawings of duct system.

So...Question from beginning of this disquisition. Is it possible to run
Fabrication CADMEP on Autodesk Plant 3D
Fabrication CADMEP also use some type of SQL database ?...will be a problem/ collision with existing P3D SQL database ?