The two correct statements that accurately differentiate between dark matter and dark energy are:
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Dark energy is the cause of the acceleration of the universe, while dark matter is the cause of the formation of structures.
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There is much more dark matter in the universe, by mass.
These statements highlight the differing roles of dark matter and dark energy in the cosmos. Dark matter contributes to the gravitational effects that lead to the formation of galaxies and structures, while dark energy drives the accelerated expansion of the universe.