What are the differences between a bone-in rib roast and a prime rib?

A bone-in rib roast and a prime rib are essentially the same cut of meat, which comes from the rib section of the cow. The main difference is that a bone-in rib roast is the whole cut with the bones still attached, while a prime rib is a boneless cut that has been trimmed and tied for roasting. Both cuts are known for their tenderness and rich flavor.