The car is being lifted at the same point which is
the front of the spring at the bolt hole... with a shock
on the rear it will see a farther travel than if its
in front.... its a matter of what the shock likes
that makes the difference... its pushing oil through
a set of holes... now does it like the pressure of
the oil to be higher(with the shock in the rear) or
with the pressure to be lower(with the shock in front)..
the higher and lower pressure is from the distance
that the piston travels in the shock(its mounted on
the shaft)... not all shocks are equal.. when I took
the Dave chassis seminar he spoke alot on shocks and
how some react to different inputs