T-bone and porterhouse are two cuts of meat gotten from the short loin, i.e., the part of the body that contains muscle starting from the ribs to the lower part of the back, where the last ribs are (sirloin). Both look very similar to their bones look very similar. However, there are some differences between the two.
One of the major differences between the two cuts is that porterhouse contains more filets compared to T-bone. Another difference is that both T-bone and porterhouse are gotten from different parts of the short loin.
T-bone is gotten from the center of the short loin, whereas porterhouse is gotten from the larger end, especially the large piece of tenderloin. As a result of this, T-bone does not contain too much of tenderloin like porterhouse. In terms of thickness, T-bones are not as thick as porterhouses. Also, porterhouse has more marbling on its surface than T-bone.