Yes and your original post is still wrong VNAV PTH.
APU to PACK there is no Eng Bleed Air going to any packs.
L Pack is supplied from APU, R Pack is off.
So Basically:--
PACKS OFF::Bleeds both open, L and R supplying C1 and C2 demand pumps
APU to PACK:: L Bleed off, R Bleed supplying C2 Demand pump.
So if you were picking differences APU to PACK would give a little extra thrust over Packs off. Wouldn't be much though.....