The Orthodox are the best folks to ask, guys like my friend Hesychios on here for example. But I’d say the major differences are:
1.) The filioque (Catholics accept it, Orthodox do not)
2.) Leavened bread for the Eucharist in Orthodoxy, Unleavened in the Catholic
3.) The role of the papacy; the pope is just another bishop to the East, he’s infallible and the supreme head of the Universal Church in the Western view
4.) Scholasticism is a turn-off to the East, was widely used in the West
5.) Immaculate conception accepted by the Catholics only really
6.) East prefers conciliarism, the West papal supremacy with councils
7.) Catholics accept development, Orthodox do not
8.) Liturgy has differences though the fundamentals are the same
9.) Long ZZ Top beards vs. some clean shaven


10.) West accepts Eastern sacraments, East doesn’t accept West
There are other nuances and subtle as well as significant differences…but those are the biggiest I think…Like I said, Hesychios and Byzantine Wolf have great knowledge of these things, my Eastern brothers in Christ…
I hear a lot about the Orthodox Catholic church (I think that’s the name for it?) but don’t understand much of how it differs from the Roman Catholic church. They seem to hold many of the same views. So what are the essential similarities and differences?