Visit any butcher or steakhouse, and you will see these terms used interchangeably. Both T-bone and Porterhouse steaks have both the strip loin and tenderloin filet; however, Porterhouse steaks are cut from the rear of the short loin and have a wider tenderloin filet. T-bone steaks are cut closer to the front of the short loin and have a thinner tenderloin filet.