The Generally Accepted Accounting Principles exist to ensure that American accountants are using the same or almost the same standards so that comparison of financial statements between or within a company is easy and accurate. They also promote transparency in accounting. The GAAP are set by the FASB.
According to the FoodTV Encyclopedia for Delmonico Steak, the Delmonico steak is a boneless top loin steak, which is also called a New York strip steak and a Kansas City strip steak. (With the bone in, it is usually called a club steak.)
The difference between a ribeye steak and a rib steak is that the ribeye is boneless and the rib steak, which is sometimes also called a bone-in ribeye or Delmonico steak, is not boneless. Other than that, both ribeye steak and rib steak are taken from the same cut of the beef and taste just the same. Keep Learning.