What is the most expensive pork tenderloin?

Could you please elaborate on what factors determine the price of the most expensive pork tenderloin? Is it the breed of pig, the quality of the meat, or perhaps the specific culinary techniques used to prepare it? Are there any particular regions or countries known for producing this premium cut? Additionally, how does the cost of the most expensive pork tenderloin compare to other high-end meats like wagyu beef or foie gras?