Permutation City is not "far more interesting", it is a complementary exploration of consciousness and the nature of reality. Both are excellent (also both very relevant i-pumps). Permanence by Karl Schroeder is another really good complementary exploration of the idea of consciousness as transitory, a symptom of not being good at the thing that is being consciously cogitated. A cat is so good at being a cat, it does not need to waste resources on clumsy meta-aware calculations on how to cat.