Prime rib can be roast beef, but roast beef is not necessarily prime rib. The difference between the two is subtle and can be confusing. Knowing one cut of meat is not like another takes time, and roast beef vs prime rib is a classic example of a case of mistaken identity.
The name of some cuts of meat comes from where they are found on the cow. A prime rib fits this bill, but not roasts of beef, which can come from different cuts of meat. The designation of roast beef is not due to a particular cut of meat but a particular cooking style.
“The main difference between Roast Beef and Prime Rib are as follows:
- Prime rib is taken from ribs six through twelve of the cow and is the only cut that can be genuinely called prime rib.
- On the other hand, roast beef can come from the rump, shoulder, neck, or chest area.
- Some roast beef can also be steak.
Let’s look at each of these differences in more detail!”

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