[fireant]

While brain has vastly more computing resources, they are probably operating very far from the theoretical optimum. There must be so much baggage, inefficiency and dead pathways left which do not have much purpose at all. The brain was evolved, not designed, which means that any random features/mutations which did not inhibit individuals ability to procreate got to stay.

I think that even when we understand the brain completely, it will be very difficult disentangling what is useful for artificial neural networks and what doesn't really matter.