A T-Bone steak is smaller than a porterhouse and delivers that same tenderness and beefy steak flavor we all crave. Both steaks are cut from the short loin. The Porterhouse steak is cut from the rear section of the loin, are larger than T-Bone steaks and have a larger tenderloin (filet mignon) section. T-Bones are cut closer to the front of the loin and have a smaller filet mignon.