There are dogmatic differences such as the Filioque, where one Church says that the Holy Spirit proceeds from the Father only, whereas the other claims that it

There are dogmatic differences such as the Filioque, where one Church says that the Holy Spirit proceeds from the Father only, whereas the other claims that it also proceeds from the son. It's kind of like the systemd rageforks, only for sillier (unless you're religious, I guess) reasons: https://en.wikipedia.org/wiki/East%E2%80%93West_Schism https://en.wikipedia.org/wiki/East%E2%80%93West_Schism