Yes I agree but the difference won't be that significant ( at least in my eyes), especially considering how zero is already a pretty much tuned excellent. On the other hand a different (better) driver with a good engineering work (including tuning) can give much noticeable boost in technical abilities. Tuning is not everything, otherwise 1k sets would make zero sense since u could basically tune a 20$ single DD iem good enough to make a 90% performance of that higher end iem.