How did early Christian and Byzantine art differ in its focus and representation of figures in comparison to Greek art?

Byzantine art comprises the body of Christian Greek artistic products of the Eastern Roman (Byzantine) Empire, as well as the nations and states that inherited culturally from the empire. Though the empire itself emerged from the decline of Rome and lasted until the Fall of Constantinople in 1453.

Explanation:

Although the art produced in the Byzantine Empire was marked by periodic revivals of a classical aesthetic, it was above all marked by the development of a new aesthetic defined by its salient "abstract", or anti-naturalistic character. If classical art was marked by the attempt to create representations that mimicked reality as closely as possible, Byzantine art seems to have abandoned this attempt in favor of a more symbolic approach.

While ancient Greek art remained on its ideals of naturalistic but idealized depictions of the human body, in which largely  male figures were generally the focus of innovation The art of Greece and Rome was naturalistic--artists wanted to show the world about them as it actually looked. Their greatest interest was in the human body. To create an ideal , they showed the body as it would look if it were perfect.