As for doctrine the Eastern Catholic churches have the same doctrine as the Latin (a.k.a. Roman) Catholic Church.
From an earlier post of mine today:
Well, kind of. There are two levels of theology, theologia prima (first level theology) and theologia secunda (second level theology). In Greek the two are called
theologia and
theoria . The former, theologia prima, is the essential, dogmatic level of theology as contained in the Church’s rule of prayer, which is to say, in the liturgy of the Church.
Theologia secunda, on the other hand, is the result of contemplation and reflection upon the theologia prima, and it’s elaboration into doctrine. Doctrine, however, is culturally, historically and linguistically conditioned. The experience of each particular Church shapes how it understands the theologia prima. So, as Pope Saint John Paul II noted, doctrine is variable, but the underlying dogmatic faith is transcendent; we simply have to be careful not to conflate the two.
Unfortunately, for a number of centuries, the Church of Rome thought itself in exclusionary terms as the
only Church; therefore, the doctrinal pronouncements of the Church of Rome were often labeled as “dogmatic,” when, if fact, they were particular
only to the Church of Rome. Therefore, not everything Roman Catholics consider “dogmatic” really is. It is now understood that, as long as there is agreement on the level of the theologia prima, variety in the theologia secunda is both acceptable and desirable, for a Church that is uniformly Roman (or for that matter, uniformly Byzantine) can make no pretension to ecumenicity or catholicity.
For example, at the first level theology, theologia prima, we all believe in purification after death. Rome decided to define this as Purgatory. The East is completely fine in not defining this purification process and what it entails.
ZP