FYI: You have posted this question as a feature request.
Unfortunately there are no export settings. That could be the feature request.
Is samples with the same name and location imported multiple times at all? I have not tested this, so i don't know, but i can imagine that the samples are not getting new names that's not an info in the imported preset, so a sample are not imported multiple times.
What i believe you also can do is to copy both the presets and the samples from one computer to another. Just place the samples on the same path on both computers, and the presets in Pigments preset folder.
On windows i'm talking about the files in the ProgramData folder.
On a Apple computer i think the files are located in the Library folder.
This method does'nt use the Export, and does'nt use import on the computers you copy to either.