These are all interrelated.
Messaging: Includes value propositions, your story, and pitch. Also includes
things like naming, alternatives, and taglines.
Value Proposition: These are the top benefits you want to focus on for your
product based on customer and competitive unput
Pitch & Story: These should be the same. Your pitch about the world before your
product, the current approach, why it’s bad, the business consequences, and the
new world with your product should tell a story. This story should hit on your
main messaging points and value propositions.
Hope that helps!