The two correct statements that accurately differentiate between dark matter and dark energy are:
- Dark energy is the cause of the acceleration of the universe, while dark matter is the cause of the formation of structures.
- There is much more dark matter in the universe, by mass.
These statements reflect the current understanding that dark energy is responsible for the observed acceleration of the universe's expansion, while dark matter plays a crucial role in the formation and clumping of matter in the universe.