While I take exception to your shot at Father Feeney (let's leave that completely aside)...
Actually, earlier this thread you did bring up an interesting point about varieties of "R & R" which, although I don't see "thousands" of varieties thereof, there are certainly some limited range of variations, for example that which sets apart Bp. Williamson from the rest of the SSPX (which I find difficult to distinguish, apart from his being more "hard line" - or the SSPX now being more "soft line" - than the other, a difference more of emphasis more than anything else). But there is one major distinction within "R & R" which does merit some specific mention, and this is a division which first came along way back in the days when Bp. Antonio de Castro-Meyer was forced to part company with him former associate Plinio Corrêa de Oliveira and his TFP (and the Abbe de Nantes). de Castro-Meyer and Abp. Lefebvre both saw to the hierarchical and sacramental needs for the Church into the future, while de Oliveira's group rejects all attempts to sustain them, but relying only on what few (now very few) clerics as were originally accepted before all this whole mess broke out. The one (SSPX and SSPX-like and SSPX-sympathetic) is clerical and labors to keep the sacramental power and juridical authority of God's Church in this world while the other (anti-clericalist) is by now almost exclusively lay and has nowhere to go but a "church" of scattered and all-independent laity with no sacraments, no authority, no certainty, no leadership (except that everyone in it is their own personal leader), and no future. Needless to say, on this "quasi-divide" I am wholeheartedly on the SSPX pro-clerical side. We sedevacantists have had the same problem, the same "quasi-divide" between those who are (or support and assist at the Masses of) our clergy versus those who are anti-clericalist and likewise have nowhere to go but a "church" of scattered and all-independent laity with no sacraments, no authority, no certainty, no leadership (except that everyone in it is their own personal leader), and no future. And again, I wholeheartedly support the pro-clerical side. There can be no real ecclesial unity (in that sense of the Mark of Unity) without authority, truly held and properly exercised on the one side, and properly recognized and obeyed on the other.