Here is your cheat sheet. Beef Rib Roast = The raw material. Prime Rib = The finished masterpiece. They are twins separated at the butcher shop. One is a canvas. One is the painting.
So, next time you’re in the grocery aisle, you can laugh. You know the secret. You are the one who decides which name it deserves. Buy the roast. Cook it with love. Call it whatever makes you happy. Just please, don’t overcook it.
Your dinner guests won’t care what you call it. They’ll just be silent, chewing, and drooling. That’s the sound of success.