The big difference is that Francis believes that all religions are saved by that fact alone. The Church believe that all men will have a chance for grace, might it be at their last second of life, I do not know, which is why the Church forbids us to judge their soul.
Myrna, I've been pointing it out to you several times (not just me, other users as well) - you completely confuse two distinct categories here. Yes, we cannot judge fate of individual souls, but we most certainly can know what are the objective conditions for salvation without which nobody can be saved - namely, the sacrament of baptism and explicit faith in Jesus Christ and the Trinity. Nobody can be saved without those - the fact that we cannot judge individual souls does not mean that those who die without baptism and without faith in Christ and Trinity can be saved.
If the Jew or Muslim desire the One Baptism I feel that would have to come from their conversion, don't you? Why else would they desire Baptism?
If they receive the sacrament of Baptism through BoD and believe in Christ and the Trinity they are no longer Jews and Muslims, but Catholics. However, vast majority of sedevacantist priests believe that Jews and Muslims can be saved in their false religions if they are "invincibly ignorant".
Francis on the other hand, does not believe a conversion is necessary, and you know that from his many words.
Sedevacantist priests also believe in salvation of infidels without conversion. Just one example out of many:
"The truth is that in no way are pagans and idolaters, as pagans and idolaters, united to the Mystical Body of Christ. If, by some mystery of Providence and Predestination, they [pagans and idolaters]
are united to the soul of the Church, and by desire to its body, it is in spite of their paganism and idolatry. It is due to an invincible ignorance of their error." (Bishop Donald Sanborn)
If you believe we have a True Pope, so be it, I only wish you would tell me who it is?
I believe that the Chair of Peter is probably vacant, but I can't prove it with certainty.