Is there a difference between Greek mythology and Roman mythology and Roman mythology?

There is basically no difference. Roman mythology is the same as Greek mythology, but it has changed its name.

Greek myth, Roman myth, symbol and division

Zeus, Jupiter, the sky and the weather

Herajuno Marriage and Family

Poseidon, Neptune, Ocean and Wind and Waves

Aphrodite Venus Love and Beauty

Ares, Mars Myth, War and Destruction

Athena Minerva, Wisdom and Learning

Apollo, Phobos, Sun and Music

Al themis, Di Anna, Hunting and Virgin.

Hephaestus, wuerken, fire and technology.

Hermes, Mercury, Information and Business Technology

Hades, Plauto, death and the underworld.

Hestia, Vesta, housework and kitchen.

Miltel (Demeter), sayles (Ceres), Grain and Abundance.

Dionysus, Dionysus, Zui Xiang and Drama.