Actually, fact check: the Eastern Orthodox and Coptic Orthodox church have the same canon, and that canon is also recognized by the Syriac Orthodox and the Assyrian Church of the East, at present. It is slightly larger than the Byzantine canon, featuring Psalm 151 and a few other bits. In the past, the Assyrian church probably accepted a smaller canon, because East Syriac copies of the Peshitta only have a subset of the 27 books in the Athanasian canon.. The Armenian canon adds one book, 3 Corinthians.
You were thinking of the Ethiopian Tewahedo Orthodox Church, and the Eritrean Tewahedo Orthodox Church, because some people erroneously call these two churches Coptic even today, because the Ethiopian or Abyssian church was an Autonomous church under the Omophorion of the Coptic Orthodox Pope of Alexandria, with its bishops appointed by the Holy Synod of the Coptic Orthodox Church, until the Ethiopian church was granted autocephaly in 1959. His Holiness Abune Matthias is the sixth Patriarch of Ethiopia. In 1994, the Coptic church granted autocephaly to the portion of the Ethiopian church in Eritrea after that country won a war of independence, and became the Eritrean Tewahedo Orthodox Church.
These two churches feature two canons of scripture, a Broad Canon and a Narrow Canon, which differ in that the Broad Canon includes the Didascalia and other additional books in the New Testament. The Narrow Canon features a large number of additional books in the Old Testament (the Broad Canon features these also, plus one more Old Testament book). The most noteworthy items in the Ethiopian canon in my opinion are 1 Enoch, which was of course quoted by St. Jude in his epistle, and Jubilees.
To my knowledge, there are no presently extant churches other than the Protestant churches which have a smaller OT or NT canon than the Roman Catholic canon. Additionally, the Anglicans accept most of the Deuterocanonical Books* as they read them in Morning Prayer and Evensong; they are included in the Apocrypha section of any complete King James Version (sadly, nearly all KJVs printed since around 1800 lack the Apocrypha for cost saving purposes). I also came across a post while perusing old threads in Traditional Theology, written by my friend
@MarkRohfrietsch in which he stated Lutheranism has an open canon, if I read it right, and Mark is The Man when it comes to Lutheran theological chops.
It is starting to look less likely I will be able to make it to Canada in October by the way Mark - what time does the fall foliage come down? Right now its looking like at least three weeks before I can get out of here. But the Christmas season might be nice; it occurred to me the
Canadian might be a lot of fun in December if they have the Park Cars opened up. I need to check the VIA Rail website...