I'm not all too fond of the Persepolis visual exploration, but I came to enjoy the storyline nonetheless. I hear what you're saying about CoG; read the book first too. And nothing beats an original P. Auster situation, but I thought the adaptation was in itself very succesful. Superb visual associating one frame to another; thought it was very close to the way of Auster's writing. And I loved the Auster cameo in the adaptation, i.e.
(that's him on the right).
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The true test, after all, is to be like everyone else. Once that happens, he no longer has to question his singularity. He is free—not only of others, but of himself.