No, and that quotation is why.
Some espouse the “Tollhouse” theory. They all believe in the need for purification for prayer for the dead. Again, parallel.
Neither believes what the other argues against. It’s really just the difference between greek and latin verbs.
Just read what I can from different sources and I don’t remember where it was about the Filioque or Purgatory I read it at. Thanks for the clarification 
What I notice is that Roman Catholics minimize the differences between Roman Catholicism and Eastern Orthodoxy. However, the Orthodox insist that there are serious differences. Please see the 1848 encyclical of the Eastern Patriarchs:
Do the Eastern Catholic churches accept the teaching of the Roman Catholic church on indulgences? Can an Eastern Catholic receive an indulgence, either partial or plenary as is possible for Roman Catholics?
Indulgences are a Weetern idea. Again, as long as their is agreement at the level of theologia prima, we accept diversity at theologia secunda. So, yes, we accept indulgences as something particular to the Church of Rome. Byzantines and I assume other Eastern Catholics ascribe to the traditional eastern view of theosis.
Is this then a big difference between Eastern Catholic theology and Eastern Orthodox theology? AFAIK, Orthodox do not accept the Roman Catholic theology of indulgences. But do you say that Eastern Catholics do accept such?
As Eastern Catholics we accept the theology of the Church of Rome, as long as we are in agreement at the level of theologia prima and as long as it is not forced upon us. Eastern Orthodox are not in communion with Rome and so, do not accept developments of Rome that took place during the second millennium.
It is my understanding in the Eastern tradition this period of “purification” or “partial separation” from God is not one of suffering, where in the Western tradition it sometimes express purification by fire and pain and suffering similar to that in Hell but with the assurance that in time you would be united with Christ in Heaven. Would this be a correct assumption, or if you can clarify further?
We believe that it is necessary to believe in this intermediate after-death state in which souls are perfected and brought to full divinization, a process of growth rather than of punishment. This wouldn’t be described as involving suffering or fire.
Yep!
My understanding, as a Catholic, is that purgatory is a state of purification. It’s “painful” in the sense that we will purge any & all improper attachment.
He is venerated in the Byzantine Catholic Churches and we celebrate his feast day twice a year. November 14 and the second Sunday of Great Lent.