So up here in NE Ohio, my neck of the woods, we have, within about 30-40 minutes of each other:
1) SSPX chapel/school in Richfield, OH (developing into a priory I think).
2) SSPX mission chapel in Girard, OH
--I live about halfway between these 2
3) Independent SSPX-aligned chapel (Akron, OH)
4) SSPV chapel in Parma, OH
5) CMRI chapel in Akron, OH
6) two Motu Masses in Akron, OH (not to mention a few in Cleveland)
7) probably a dozen Eastern Rite churches
Strangely here, unlike Cincinnati, there's a generous ebb and flow of people among these chapels. Quite a few people who went to CMRI chapel went to school at the SSPX-aligned independent chapel (went to daily Mass and communion also). Father Jenkins has no issues giving communion to SSPXers (including those of us from the Independent chapel). In fact, a member of Father Jenkins' chapel has taught for years at the school of the independent SSPX-aligned priest. Probably the odd man out here would be people from the CMRI chapel in Akron would not be welcome at Father Jenkins' St. Therese chapel. But otherwise, you have people flowing back and forth between CMRI, Motu, independent, SSPX, etc. That's how it should be really. In this crisis, NOBODY has the authority to bind consciences on the controverted issues facing us.
So I think that the big differences between SGG and Fr. Jenkins:
Fr. Jenkins is OK with giving the Sacraments to una cuм people, whereas SGG is (reportedly) not. Fr. Jenkins is much less dogmatic about SVism.
Meanwhile, SGG is OK with the CMRI and +Thuc lines, whereas Fr. Jenkins is decidedly not.
Strangely, EVERYBODY hates Feeneyites, although I believe SSPX will tolerate them, given them the Sacraments, as long as they don't prosletyze.
Recently of course there was a major falling out between Bishop Sanborn and Bishop Dolan, whereas the two had worked very closely for many years (both OK with +Thuc lines, same dogmatic SVish theology). But they were on the point of excommunicating each other over SVism vs. Sedeprivationism. Talk about elevating theological opinion to the level of dogma!
And then there was some kind of major falling out between Bishop Kelly and Fr. Jenkins that I still can't get the full details about from someone who's a member of Fr. Jenkins chapel. It seems to be kept somewhat hush-hush.
So the offshoots of The Nine, although they share very similar theological positions, still have managed to find ways to excommunicae one another.
This is absurd and childish and has done great harm. Nobody has the authority to bind consciences. If I were a priest and though +Thuc line was doubtful, I would admonish the faithful that I believed their souls were at risk, but I would not bar them from the Sacraments. Their opinion about the validity of the +Thuc lines doesn't make them non-Catholics, and Catholics have a right to receive the Sacraments. Even though I have a "strict" view of EENS, I would not bar from the Sacraments someone who believed in BoD. Etc. etc. about every position that hasn't been dogmatically settled by the Church. THIS elevation of theological opinion to the level of dogma absent Church authority, and thereby effectively a usurpation of an authority that belongs only to the Church, is and has been the bane of the Traditional movement. It's the result of the flock being scattered due to the Shepherd having been struck.