The first, and most noticeable, of which is the lack of a "moon", as well as Lucifer being somewhat larger than Earth, and covered with ice, and has a thinnish atmosphere of, primarily, Nitrogen and Carbon Dioxide. It is brighter to the Ishtari than Earth would be to us. Never the less it has the same revolution time around the sun, and the same inclination to Venus' orbit.
Lucifer is said to be the home or realm of a god who is the enemy of Marduk.