Amici's offers one set-topping vegan pizza as well as the option to make a pizza on your own with whatever toppings.
I got their veggie pizza made with Daiya ($21.35 without tax for a medium). While the pizza tasted pretty good, it definitely wasn't "east coast"---the crust was too chewy and too thick. It was a poor imitation at best in terms of its texture. Again, though, it tasted good.
My biggest gripe is that this place isn't a good value. I cleaned off an entire medium with no difficulty (and I'm not exactly ravenous by any means). That ended up being a $28+ meal (with tip and tax) for one. I'm willing to pay good money for good food, but $28 for a pizza is absurd.
On a whole, if you're looking for vegan pizza, I'd go to Patxi's instead. Just as Amici's is a poor imitation of east coast pizza, Patxi's is a poor imitation of Chicago-style deep dish. But it's a better value and also offers Daiya.