Lower control arm sway bar tabs not the same height

The angle I shot this at is close but not good enough to let you see that both arms relative to the bolt that you have highlighted are the same space wise. But I did measure from the grease fitting down and the drivers side is roughly 1/2 inch higher than the factory joint is, so there is a real difference in the joint castings as far as the overall size of the "ball" socket of the joint. Now looking at it really close ( I should have in the first place..duh) you can easily see that the two joints are noticably different size wise in the lower cup part of the joint where the grease zerk goes in. The "ball" is smaller, height wise on the drivers side which was the one that got changed out years ago. I have to believe that's the big difference here. But doe's that difference matter and if so, why?