You could look at them as two sides of the same perspective: Paul is saying basically that competition doesn't exist because if you focus on the customer need enough it ensures uniqueness, and Peter is saying don't copy what someone else has done, be unique.
Zappos is not unique. They don't have a monopoly on anything and ultimately sold out to Amazon probably because there wasn't a way to grow much beyond their market of people who pay premiums on everything to get easier returns.
