for what its worth, i had to do an overdub in a makeshift pro tools rig-set up thing inside a tracking room while the album was being mixed in the control room, i cant remember if the original was the focusrite console,and 4k g series or a 1073 pre(might have been an original 312), anyway different mike, different room straight into pt instead of tape, and the studio,o'henry(R.I.P.) hank, who had EVERYTHING had an origin that millenia had given him on permanent loan, anyway that flavor of clean made it very easy for me to almost perfectly blend the o/d with the original signal, that said the origin seemed balless solo'ed but very decent within the context of material.
anywhooo....