Ryan is right on the money with this one, I've experienced it firsthand. Actually, it was with two identical drivers- One was brand new and one had been pounded on for a year. Used them both at the same time on the same channel of power and I'm sure you can guess which one was moving more. And that's with strikingly similar specs, imagine how it would be with relatively varying numbers.
Ryan, that is a beautiful TL in your sig too, bro. Nice to see some actual line length and a chamber right before it. So ghey for you, no ****.
Lulz.