Both religious ceremonies involve the sprinkling or immersion of water to symbolize purification and initiation into the Christian faith. However, there are some subtle differences. Baptism is typically associated with the Protestant faith and involves complete immersion in water to symbolize a person's rebirth in Christ. On the other hand, Christening is usually related to the Catholic Church and involves sprinkling water on the forehead to represent a person's initiation into the Church. Ultimately, both ceremonies have the same goal: to welcome someone into the Christian faith and to mark their commitment to following Christ.