Originally Posted by BAC5.2
Subaru retracted that "official" statement several years ago. The new, official, statement is what I posted above.
Any difference in degree of wear has the potential for permanent drivetrain damage. All 4 tires need to be the same.
Latest "official" word is probably written by overly zealous lawyers. In reality 1/32nds is probably safe, especially for non-STI/spec.b.
If one is under warranty - I'd probably keep the wear equal. Otherwise I'd ran it if the price is good.