[kooz]

The first 2 words I have for you are: Product Support. The oo2 is on its way out, just like the oo1 before it, which is no longer supported.

The next 2 words I have for you are: Word Clock. If you are a semi-pro with lots of digital gear that needs to talk to each other, this addition will make your life considerably easier.

Other than those 2 things/four words, I'm guessing most of the guts are identical. If you do the eBay thing for an oo2, make sure the seller is a registered owner, and that they are willing to transfer ownership to you so that you can take advantage of hardware upgrades down the line, if you should happen to need them.