There were several differences resulting in the `'eastern schism`.
1) whether the Bishop of Rome is legitimately the `Pope' with authority over all Christendom (as believed by the Roman Church) or one of a group of important bishops (technically, the Pentarchy).
2) double vs. single procession of the holy ghost (the filioque)
3) the authority of the 7 ecumenical councils vs. those plus subsequent accretions
4) shape of tonsures
5) whether no priests can marry (Roman) or secular priests can marry but not monks or bishops (eastern)
6) whether the Host is leavened (eastern) or unleavened (Roman) bread
and a few other geographical, ritual, and theological controversies (e.g. whether the Virgin Mary can be called mother of God or only mother of the human nature of Jesus)