Perhaps it's semantics, but there is only one "mechanism" by which God dispenses saving grace -- faith in His Son as Lord, King and Savior, made known to us through the Scriptures as we are guided by the Holy Spirit.
Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds" -- Hebrews 1:1-2"God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
Cheers!