Dear David,
You asked:
What is the essential difference between "Cyprianite ecclesiology" and the "Florina model"?
What you ask is really complicated from a historical perspective, but I'll try to condense this for you.
I'm assuming you already know about the Pan Orthodox Councils in the 1500's. The 3rd one in 1593 formulated an anathema against any adoption of the Gregorian calendar paschalion and menologian, as well as anything contrary to the Tradition of the Church.
There were also about 9 or 11 more local declarations condemning the new Calendar, up thru 1924.
In 1924 the Greek State Church adopted the Revised Julian Calendar, which adopted portions of the Gregorian Menologian, but left the Traditional Paschalion intact. Many in Greece felt this put the State Church under the 1593 Anathema.
1925, an Athonite monk, Athanasios Danielidou concocted a theory that the New Calendar was only "potentially" without Grace, not "actually". (THIS IS THE FORERUNNER OF CYPRIANITE ECCLESIOLOGY.)
1926: The Sacred League of the Zealot Monks from Mt. Athos, held a council and condemned the theory of Athanasios Danielidou. Many of these Athonite monks were to become important figures in the OC Church later on: Frs. Matthew (Mathewites), Akakios Papas (later 1st hierarch of the ROCOR derived GOC), and more.
The Holy Greek Orthodox Community of True Orthodox Christians -- a lay assembly, supported the Athonite Fathers that the new Calendarists were fully schismatics
1935: 3 bishops returned to serve the True Orthodox Christians. These men were: Bps. Chrysostom formerly of Florina, Germanos of Demetrias, and Chrysostom of Zakynth. In front of the assembly of the TOC faithful they signed a Declaration proclaiming the State Church of Greece as schismatic and without Grace. They were applying the 1593 anathema against the Gregorian Calendar, as had been done by several local councils before them.
they then consecrate 4 more bishops: Matthew of Bresthena, Germanos of Cyclades, Christopher of Megara, Polycarp of Diavalia.
1937: Bps. Chrysostom of Florina and Germanos of Demetrias, began to preach and write that the New Calendar was only potentially in schism. Three bishops eventually return to the State Church, while Bps. Germanos of Cyclades and Matthew alone held fast to the 1935 Declaration and asked the former two bishops to explain their views.
In essence, a Synod was never granted and eventually the parties were no longer in communion and remained divided over the matter of "potential" vs "actual" schism.
1948: the TOC under Bp. Matthew could see that he was elderly, ill and could not find another bishop to help, decided to single handedly consecrate another bishop (Spyridon). These two then consecrated more bishops, now know as the "Matthewites". Bp. Germanos was in prison, and Chrysotom of Florina vowed to never consecrate any more bishops.
1950: shortly after the death of bp. Matthew, Bp. Chrysostom of florina reaffirmed his position as that of the original 1935 Declaration. However, he left his flock bishopless and requested that they patch things up with the Matthewites. (This never happened.)
In the 1960's, the "Floronite" remnant managed to get Archimandrite Akakios Papas consecrated by a ROCOR bishop and a Romanian bishop who was a New Calendarist. Later, Bp. Akakios consecrated a bishop with another ROCOR bishop in Greece, thus founding the revived "Floronites", aka the GOC, or "Floro-Akakians".
the "revived" Floronites were basically of a Matthewite mentality, i.e, that the New Calendar was "actually' in schism and therefore without Grace. (Florinite bishops: Akakios and Auxentios were defrocked Matthewite clergy...hence the similar ecclessiology.)
So, to compare the Cyprianite and Floronite ecclesiologies it depends on which era of Florinite history you refer to. The ecclesiology of Met. Cyprian of Fili is similar to the ecclesiology of Athonite monk Athanasios Danielidou, in that the New Calendarists are "potentially" in either heresy, or schism, respectively. This ecclesiology is the same as that of Met. Chrysostom of Florina during his years of 1937 to 1949, but dissimilar to his ecclesiology of 1935 and post 1950.
I hope this helps. It is confusing and has taken me years to get the data straight.
in Christ,
Nectarios Manzanero
Austin, TX Exaltation of the Cross Mission