[Siegmund]

If I had to give a one-word answer I would say Ginger. My justification would be "Ginger has potential to do something new, Fred can only understand all that has come before." The better answer, as already noted by several in the thread, is that they are suited for different careers - Fred as a 'technician' (accountant, broker, limit poker grinder, editor, whatever) and Ginger as a 'creator' (researcher or author or whatever.)

Somebody asked, are there really Gingers in the world? Yes there are - and, I have to say, from my time as a mathematics student, I thought much more highly of the people who grasped the concepts and could "see where we were going next" than I did of the people who wrote the best proofs. Writing the proof is the necessary evil that comes AFTER the flash of insight of what you want to prove.