Eheh, yes, in a sense I suppose so
The differences in species are simply orders of magnitude larger than the differences within a species. Any inherent biological differences between individuals of a given species are, as you said, far outweighed by both the biological similarities and the effects of environment and learned behavior.
Behavior and cognition, figuring out how and why we learn to do the things we do, is truly fascinating stuff, and why I decided to go to college ten years later than the average youngling.