I must say that I am confused about how this works…
So, apparently, both churches accept all of each other’s sacraments as valid, that is, in theory, a Catholic can receive communion from a orthodox liturgy (although in practice no), etc.
Concerning the Eucharist: Many Orthodox Christians do view the Roman Catholic Eucharist as the Body and Blood of Christ; others today would not subscribe to this. The answer is linked to whether one believes that Roman Catholicism is “with grace” or “devoid of grace.” Orthodox Christians are not permitted to receive Communion in non-Orthodox communities, including the Roman Catholic. To do so would imply a unity that in fact does not yet exist. Also it implies that we are “united” to the faith community from which we receive the Eucharist.
In brief, while Roman Catholicism sees Orthodoxy as a “sister church”, Orthodoxy sees herself as the fullness of the Church, not the “other half” of the Church, as implied in the notion of a “sister church.”
And the beliefs of the Catholic Church is equivalent to Orthodox Church’s.This includes worship texts, too.
There are teachings held by Catholics that the Orthodox view as Heretical. There are Western rite Orthodox Parishes that worship similarly to Roman Catholics, Anglicans, or Lutherans.
So perhaps the line between these two churches are really exaggerated?
Orthodox Christianity has not reached a consensus on the Balamand statement, in part because not all of the world’s Orthodox Churches participated in the gathering, and in part because controversy has risen over the “sister church” or “two lung” theory. While there are some Orthodox who would perhaps ascribe to these notions, it is my understanding that Orthodoxy is the Church, not half or part of it.