I think that since evolution is a gradual process that it is foolish to think that we have any traits that are completely unique to us, and since evolution in no way has aimed for humanity, it is also foolish to think that all of these traits must be a degree less in other animals than humans. Beyond abstract thought, and intelligent, I do not think it is justified to think off the cuff that all of our traits are more intense than other animals.

More cognitive and intellectual abilities varies within the human species. Does emotioal ability, and personality traits also? I'm not so sure that they are linked. I am not sure if it is justified to assume that all such traits are contingent on ones cognitive abilities.

I am over the opinion that it is far more parsimonious and far more in conformity with evolutionary theory to assume that we have no, or at least very few completely unique traits. Also that all because we have some traits that are more developed does not imply that all of our traits are more developed. I see absolutely no reason why other animals couldn't possess more developed traits than humans. Seems like human narsissism to suppose otherwise.