Ok, the only thing that makes it look like an Audigy 2 instead of a ZS is the colorized connectors, but the Audigy 2 currently in my computer has non-colorized connectors, so I wouldn't be suprised if they made a ZS with colorized connectors. This is especially true if its an OEM product (they like to have color-coded plugs on their system to ease installation). The connector color doesn't mean much.
There are very subtle chip differences between the boards, but they're there. Open up full frontal detail pictures for both parts on newegg, and then swap between the two. If you look carefully you can see that the chips to the right of the main chip are slightly different (amoung others that're harder to see). You should see the chips to the right of the large chip jumping around. Also compare the chips just behind the firewire port, one has them mostly lined up, while the other has them a bit skattered. After comparing those two things, which one do you think it is?
I'd say its a ZS, unless there is some sort of firmware difference, but I'd doubt that (and even so, it might be flashable). If its a good deal on a ZS its still a decent deal on a non-ZS, so its not the end of the world if its not a ZS. I'd go for it.
