What difference does Nick imply between "really" and "legally" when he says that James Gatz was "really, or at least legally" Gatsby's name?

The difference between point of view and choice of person in a story is that "person" is the literary name given to main characters in a story, and "point of view" is the perspective from which we view the story "person" is part of a term used to describe the type of narrator (as in first-person or third-person); "point of view" is how the antagonist understands the events of a story the terms are interchangeable; there is really no difference between them "point of view" refers to the perspective from which the story is told; "person" is part of a term used to describe a type of narrator (as in first-person or third-person)