If you change ride height of front or rear, or both, you will need an alignment. Makes no difference what you pull apart.
Because the upper control arm is shorter than the lower and change in front ride height changes the amount the front wheel tilts in/out at the top - called camber.
There could also be some change in the direction the tires face - dead front, slightly left or right - called toe. Even small changes in this will cause large wear of the tires, so this must be checked and adjusted, if needed, after ride height change.
If you change the front to rear ride height - as in raising the rear for increased rake - it will change the tilt of the front tire front to back - called caster. With this the car also should be realigned for best handling.
Bottom line - realign after changing ride height.