What are the major curricular differences between B.Planning and B.Arch? What is the difference in job roles that arise from the two?

Earlier, people use to think that B.Arch and B.Planning are the same course. But, since the world of architecture is widening and diversifying, the difference between the two came into being. B.Planning is the one, where you get to plan whole city, you can also go for traditional Masters in civil en