In addition the EQ curve used by Audyssey in general, even more so below 200Hz, uses a finer filter than what is allowed in the manual EQ settings. So even w/o the other information Audyssey uses switching to manual doesn’t even give you the same EQ.

3M80 2M22 6QS8 2M2 1EP500 Sony BDP-S590 Panny-7000 Onkyo-3007 Carada-134 Xbox Buttkicker AS-EQ1