I think that's exactly the right question and the answer is pretty clear that there is no comparison. I do understand that there's a little bit of something going on with water-based mammals like orcas and dolphins being able to teach certain skills to their young and so there's a notion of intergenerational knowledge there. But we're just a different order of magnitude in terms of our capability of transmitting intergenerational knowledge and it's not even close. It's almost disappointing because there's no interesting question of comparison between us and other species.

As I mentioned in another comment, I'm skeptical of the questions that imply a kind of species essentialism, suggesting that there's such a thing as a one particular trait that distinctly makes us human. I think the real answer to questions like that are vast convergences of immense clusters of facts relating to our evolutionary history and our morphology and so on. I don't think there's any like one single thing. But I do think in comparison to other species a rather elegant way of distinguishing this is to put to our written traditions which as far as I know don't really have any precedent. And if that doesn't blow you away in terms of how miraculous and special are evolutionary trajectory is, I don't suspect anything would. But the important thing is that you don't need a species essentialism to be impressed with who and what we are.