Orthodox Christians consider the differences between the Orthodox and the Roman Catholic Churches as both substantial and substantive, and resent when Catholics trivialize them. Though they recognize that both communions share a common “Tradition” or Deposit of Faith, they will point out that the Roman Catholic Church has been more inconsistently faithful – or more consistently unfaithful – to Tradition than the Orthodox Church has been in 2000 years of Christian history. Generally, all Orthodox Christians would agree, with various nuances, with the following 12 differences between their Church and the Catholic Church. I want to limit them to 12 because of its symbolic character and also because it is convenient and brief:Read his list here.
As far as the list goes there is not much that is a source for heartburn. I could add to it and I would have given different emphasis to various topics. And yes, I think there are a few points where some amplification would not be out of order. But in the end I think this is a reasonably accurate and remarkably irenic post.