Since the OP didn’t, I’ll add some content to this thread.
Since I am a Westerner, most of my inquiries are into Lutheranism vs. Catholicism. The Lutherans did not split from the Orthodox Church, so I would rather see us reunited with Rome and then start working on the Great Schism.

However, half of my family is (lapsed) Greek Orthodox and someone has made the case to me that I should return to that if Orthodoxy is true. Is it true?
I’m not worried about the Filioque. I’m not a relavitist, but I understand that the exclusion or inclusion of that clause originally expressed the same truth with two different emphases. It is excluded because the HS proceeds from the Father ultimately. It is included because the HS proceeds equally through the Son because the Father and the Son hold all things in common.
I’m not worried about the question of the Roman Bishop, because he is recognized as authoritative whether he is above the others or first among equals. Again, I’m not a relativist and there is a best way to understand Rome’s role, but either way Rome is important.
Things like liturgy and sacraments are all the same, I believe. Of course practices differ, but those aren’t
doctrines to my knowledge.
Both churches believe in Purgatory. The Orthodox see it as a journey more than temporal consequences and the Catholics vice versa, but again, that’s emphasizing one of two facets that exist in the doctrine of both churches.
Only the Catholic Church believes in Mary as co-redemptrix (well yes, it has not been confirmed yet, but it should be as I understand it), but they both believe She mediates and intercedes for us, right?
And what else have I missed that is a doctrinal difference?