1. Deluxe steaks are of relatively high quality and usually come from premium beef suppliers and are carefully selected and processed. These steaks usually have a higher fat content, which allows them to retain more moisture and have a richer flavor when cooked. In contrast, supermarket-bought steaks vary in quality, with some coming from more common sources of beef that don't have the same fat content and flavor as a porterhouse steak.

2. Deluxe steaks are usually massaged and marinated before cooking to enhance their texture and flavor. In addition, they are usually cooked quickly at high temperatures to retain their moisture and flavor. The steaks bought from supermarkets do not undergo these treatments, and their cooking methods and cooking times are different.