There will be several easy ways to distinguish the 1st and 2nd edition decks, both on the box and on the cards themselves.
As far as quality and handling are concerned, both versions are the same. Premium finish, very high quality.
So if you're only interested in having a nice performance deck and you're not into collecting, the 2nd edition is awesome for you. If you're a collector, the release of the 2nd edition decks will not kill your investment in 1st ed decks.