Plinius class A vs. class AB sound difference?

I am considering purchasing a Plinius amp. I have read that many audiophiles do not hear a difference in an SA100 when it is switched between class A and Class AB modes of operation. If this is indeed the case, then would a Plinius 8200p (power amp; not the integrated) which is supposedly the same class AB circuitry found in the SA100, sound identical to the SA100?