For many Protestants, especially evangelicals, that language is tied closely to a personal turning point. It often means someone consciously repented, believed, and began a new life with Christ.
Catholics also speak about new life in Christ, but they usually explain it differently. They often connect spiritual rebirth with baptism, grace, and a lifelong life within the Church.
That is where the divide often becomes clear. One side tends to emphasize a personal conversion moment. The other tends to emphasize sacramental beginning and ongoing formation.
So when someone says, “I’m born again, not Catholic,” they usually mean more than a label. They are often talking about salvation, assurance, authority, and what makes faith feel truly alive.