Mars vs. Ares

the ancient Roman god of war and agriculture, identified with the Greek god Ares.

Astronomy. the planet fourth in order from the sun, having a diameter of 4,222 miles (6,794 km), a mean distance from the sun of 141.6 million miles (227.9 million km), a period of revolution of 686.95 days, and two moons.

(often lowercase) of or relating to any of various pigments used in painting that are artificially made from an iron oxide base:

the ancient Greek god of war, a son of Zeus and Hera, identified by the Romans with Mars.