When a Protestant hears a Catholic use the word ‘Church’ he hears man-made traditions and idolatry of saints. When a Catholic uses the word ‘Church’ he means the mystical body of Christ whose three realms (Heaven, Purgatory, Earth) with its divine Head are united and animated by the Holy Spirit.

The first believes the gospels formed the Church; the second that the Church formed the gospels. The first believes the Holy Spirit inspires Scripture; the second that the Holy Spirit inspires Scripture and guides the Church that Christ personally established to authentically interpret it.

The first claims individuals must have a relationship with Christ. The second concurs, believing they are baptized into Christ as part of His mystical body and need to feed off His divine Life in the sacraments.

Obviously these are generalities; but generalities exist because they’re usually in large part true.