The question was NOT what is more important, rather HOW important is the tonearm. And I think we all agree that the arm is very important.
Soulbrass, all things being equal, etc., the low-end cart on the high-end arm will sound better because the arm is providing more complete support to allow the lesser cartridge to sound its best.
Soulbrass, all things being equal, etc., the low-end cart on the high-end arm will sound better because the arm is providing more complete support to allow the lesser cartridge to sound its best.