Spindles should not change alignment at all. Control arms should. Springs should too. If the installed height from ball joint hole to ball joint hole is the same on the spindles (which by the way ARE NOT spindles, they're knuckles) is the same only the hole where the hub bolts is higher (to lower the ride) there should be ZERO difference in ball joint wear.

Those are all the shoulds.

Now for the real stuff. You guys have used the parts so your opinion should matter. Just wanna clear up some nomenclature in the event there is some coincidental issues.