I don't know if there would be that much of a difference, as long as both lungs are fully penetrated. My understanding is that penetrating both lungs with a sharp object (i.e. broadhead) and opening the insides of the lungs to the outside air pressure generally causes both lungs to collapse, and the deer dies from suffocation rather than blood loss. You may get better blood trails from a lower lung shot, but I'm not sure if it's going to kill the deer much faster.

I aim for the middle of the lungs so I have some room for error in each direction. No deer that I've double-lunged with an arrow has gone more the 75 yards after the hit. Most have piled up within 40 or 50 yards.