Final answer:
The Roman Catholic Christianity and Orthodox Christianity differed in the role of the Pope, the use of icons in worship, and the language of religious services.
Step-by-step explanation:
There were indeed several differences between Roman Catholic Christianity and Orthodox Christianity, which led to the split known as the Great Schism. One of the main differences was regarding the role of the Pope, where the Roman Catholic Church recognized the Pope as the supreme authority over all Christianity, while the Orthodox Church considered the Patriarch of Constantinople and other patriarchs to have authority that was equivalent, refusing to acknowledge the Pope's supremacy. Another difference resided in the use of icons in worship; while the Western Church widely accepted the use of icons, there were times the Eastern Church was divided over the issue, with some factions opposing what they viewed as icon worship. Additionally, the language of religious services differed; the Western Church utilized Latin, and the Eastern Church primarily used Greek.