It seems as though i really cant. I dont see any review that could mention that, there's also no word no their FAQ, nor do i see anything listed on the specifications that differentiates them. But this bugs me since i want to have control over my purchases, and i'm worrying it could be something important missing that could make me wish i had aqcuired the 2.2. Since it's already out and there's not something to just look forward to...