The Rosary is not a collection of magical formulas such that, if we say them faithfully (and say the “right” one), we will be graced with this, that, or the other.
The Rosary is, in fact, a device that fosters meditative prayer and is generally recited in the manner of lectio divina: slowly, deliberately, out loud, and with a quite mind.
During the course of vocal prayer, the Pater Noster, e.g., we speak, God listens. If one wishes, one can employ the Rosary vocally, (in whatever form) and say to God, “OK God, now I am going to say this Rosary and, in exchange, I want you to perform for me.”
During the course of meditative prayer, God speaks, we listen. The object of meditative prayer is to clear the mind of its noise so that we may perceive God’s voice - that “quiet whispering sound” - if He chooses to speak. Employing the Rosary meditatively (again, as in lectio) focuses our attention on the words and quiets the mind. What we say is not the point: it’s how we say it.
As an aside, I would note that one can employ the Rosary as a device that prompts one to call to mind Jesus’ Pascal sacrifice - as does a crucifix, an icon of Mary or the Sacred Heart, or the pain of my aching back. If that is the goal, then simply do whatever works.
May God Bless,
Monk