Our parish has two priests most Sundays being an Anitochian church the parish priest is Antiochian, of course, but his backup most Sundays and sub when he's not there is OCA. We do 99% of the service in English but when we go multilingual we do Greek, Slavonic, Arabic, and sometimes Spanish. We use Byzantine music and Russian four part music, too. So yes there are the differences in details that have been mentioned above, but more similarity than difference I would think. But maybe that just us.