Lower control arm sway bar tabs not the same height

If it was me and my car, I would put the swaybar on it using the rubber bushing thickness or washers to let it mate up equally on each side.
Otherwise it's going to put a slight bind on it between them. (One side would pull down/up on the other side.
That being said, I don't think a half inch is going to matter very much in the overall scheme of things.

JMO