If we do not identify whose faith we are saved through, it can cause you problems later. We are saved by grace through (Christ's faith, Gal 2:16) and that not of ourselves, lest any man should boast. Our spiritual faith can be the cause of us experiencing many deliverances while we live here in this world, but it plays no part in the cause of our eternal salvation.
I think we are at a disagreement.
what you refer to as Christ's faith is what justifies people. It is Christ faithfulness that righteousness is imputed to people and the remission of sins was achieved by His death and resurrection. true without this no one could be saved.
I believe it has to be individual faith in Jesus that saves. People must have spiritual faith or they will not be saved in this world or the world to come.
However individual's spiritual faith is a gift of God by His grace and everyone is given the different amount of faith in different measures. It is like the parable of the talents. You are entrusted with a certain amount, will you make it grow or hide it in the ground out of fear?
Salvation is more then justification, it is also sanctification. Both are works of the Holy Spirit in the lives of believers. if you are not chastens by God then you are not adopted children.
I think the difference is that we do not agree on the point of who Jesus died for: the whole world or just a select few. In addition I believe we don't agree what is needed for salvation either.
Do you believe someone can be saved without being sanctified?