I concur with you, for the most part. Just to qualify your position a bit, though, differences can be magnified by social conditions, training, even (un)natural selection. Take for example, the situation of a two-year old child running, squealing and waving her hands. Now, have her observed by two dogs, a Labrador Retriever and a Border Collie (I won't pick on the obvious breed everybody picks on). Same species, inter-breedable, but the responses to the stimulus will be very different, even if the individuals receive the same basic training.
And I concur with you for the most part because as you will leap to say, people are not dogs.
And I concur with you for the most part because as you will leap to say, people are not dogs.
Actually, if all of them have received the same training, then they will all act the same. B/c training supercedes any deviation in brain formation / chemistry that would dictate otherwise. That's the point of training.