William,
I really don't know the answer to the question, except to say that Peter Lederman has personally seen the tonearm on my turntable, and he responded accordingly. I wish I knew more, but right now, I don't. The reason I don't is because the turntable I built is a prototype, but not my property, so it is not in my possession. Confusing, no? Anyway, I'll ask about the match because it is an interesting question. I am of the opinion that the arm was made with a higher effective mass, however.
Caveat: If I am mistaken, it won't be the first time!