How do I duplicate Apple Configurator profiles?
Got it.

Open the XML file in TextEdit (or some other XML editor of your choice).

Scroll to the very bottom.

Look for:
        PayloadDisplayName
    Orig Profile
    PayloadIdentifier
    orig.profile

Change these two instances Orig to Dup or some other unique name.
Save file.
Go to configurator > import > point to file - it imports as 'dup profile' with all other settings in tact.

(I suppose you could also make XX copies of the XML file and edit each one, but it is easier just to leave the file open in TextEdit, make a change, save, import, make a change, save, import, lather, rinse, repeat.)