No, the upright/knuckle, from a geometry standpoint, is the same on everything. The outback is taller because of the struts, springs, tires, and spacers between the crossmembers and body. ABS sensors and bearings changed a little over the years and the newer sti uprights are wider where the strut attaches but that is all.
What are the springs supposed to go on?
Mixing springs and struts between models and generations usually results in a funky ride height because the spring perches that are welded onto the struts are in different places depending on what they are for.