Manifest destiny vs manifest design

What is the difference between manifest destiny and manifest design? I have an essay test tomorrow and that's one of the questions

Manifest Destiny was the belief that the United States was destined to expand from the Atlantic seaboard to the Pacific Ocean

Manifest Design is an idea that came around much later, shown in policies during Jackson's presidency, that's the belief that these territorial gains come from the desire for national stability---not necessarily individual pioneers or threats from abroad.