You should try to convince them to differentiate the neo-Resistance’s theology from the neo-SSPX, because, right now, they are the same.

This is a valid question that I would like a more in-depth answer to.  As it is, all we know is that the Resistance is opposed to a PRACTICAL deal with new-rome, while the new-sspx is ok with one.  Generally speaking, the Resistance is opposed to V2, while the new-sspx is less opposed than they once were (i.e. +Fellay lukewarmly and confusingly saying that V2 is "95% acceptable").  But as far as the new mass goes, I don't see much difference in either theory or practice.  Both groups make allowances for attending (i.e. funerals, marriages, emergencies, etc).