In the book wonder, how does Auggie compare himself to Daisy the dog?

I'm not sure what chapter your question pertained to, but I believe the quote you are looking for is the one I am placing below:

And I wondered if Daisy was sleeping in heaven right then. And if she was sleeping, was she dreaming about me? And I wondered how it would feel to be in heaven someday and not have my face matter anymore. Just like it never, ever mattered to Daisy.