I think it depends on the particular individuals and the company. Sometimes the only difference may be salary. There's already a bunch of different responses he

I think it depends on the particular individuals and the company. Sometimes the only difference may be salary. There's already a bunch of different responses here on what the difference could be. My own rough heuristic is that a person in a senior position should have a clear sense of the influence on business value that they and their decisions make. A junior developer is engrossed with solving a problem, a senior developer is engrossed with the business improving on some metric by means of solving a problem.