
Eastern Orthodox and Roman Catholics are
both “Chalcedonian Christians”. It seems to me you’re trying to create a disagreement where none exists.
The Catholic Church is not just the Roman Rite only - there are 12 different rites - one of which is Coptic Catholic - they still teach and believe in 1 Nature of Christ - they are not “Chalcedonian Christians” but they are Catholic in union with the Pope.
Well now you’re just being silly. Or don’t you think there were disagreements on those issues in the Undivided Church of the first millennium?
When there were disagreements, a Council was called by the Empirer and the matter was settled by the Holy Spirit…someone/some group always ended up being a heretic. There is Orthodoxy (Right Belief) and there is Heresy (Wrong Belief).