So I got stuck with this question and didn’t know how to answer:
"What makes the “sacrament” of a Catholic wedding different than a Protestant wedding . Both seek to bring God into their hearts and into their marriage? "
I guess I could have answered about it being for life (although there are annullments for some), and that it’s a sign of communion with the Church. Anything else?
Certain Sacraments can only be conferred by a priest, deacon, or bishop (one with Holy Orders). Those include Holy Orders, Confirmation, Anointing of the Sick, Eucharist, and Reconciliation. These Sacraments require the priest to do what Christ does.
Baptism has the priest, deacon, or bishop (one with Holy Orders) as the ordinary minister. However, due to the absolute importance of Baptism (i.e. its necessity for remission of Original Sin and incorporation into the Body of Christ), the Church has always taught that in the absence of a priest/deacon anyone may baptize. For Catholics, that would be in an emergency situation or in missionary territory. For non-Catholics, that means their laypeople and clergy (who are also lay people in reality). If they baptized in the Trinity, it is valid and a Sacrament, even though the non-Catholic community may reject the idea of sacraments.
God insituted marriage at the beginning of time. Christ raised it to a sacrament among the baptized. The giving and receiving of consent is done by the couple themselves. They confer the sacrament upon each other. For Catholics, the priest/deacon is the official witness of the Church, not the minister of the Sacrament. Therefore, baptized non-Catholics who are otherwise free to marry (i.e. no prior marriages and no divine law impediments) confer the sacrament upon each other when they marry, whether they recognize sacraments in their own religious beliefs or not.
So, the Catholic Church recognizes marriage between baptized non-Catholics as valid and a sacrament and indissoluable. Their marriages are the same as those between Catholics.
It also recognizes marriage between the unbaptized as valid, but not as a sacrament. A marriage between the unbaptized is called a natural marriage.