As far as I can tell, all this theorizing about the advantages/disadvantages of fuel burn order come from the example of the P-51, which had an 85 gallon tank placed far enough aft that it could move the COG of the aircraft deleteriously far back. That is why that tank was burned even before the drop tanks on long escort missions, and sometimes left empty (AHII's 75% is nearly equivalent to this) for missions that didn't tax the Mustang on range.
I don't think it matters much with other aircraft.