Fortnite Retreat the World - What is the difference?

I would like to buy Save the World in Fortnite. Only with the standard package stands, which one then has access to saving the world. But with the deluxe package, it says that you then have access to "World Rescue". Is that the same as Save the World? Or is it different from saving the world?

It is the same. It's just another word. Save the world = world salvation