They are different. Mitsubishi Heavy Industries Air Conditioning is a brand of Mitsubishi Heavy Industries, a well-known Japanese brand, and a company with advanced refrigeration technology in Mitsubishi Group. And Mitsubishi Heavy Industries Haier is only a Sino-Japanese joint venture factory, not a brand. If you want to buy an air conditioner, it is recommended to choose Mitsubishi Heavy Industries air conditioner. After all, its air conditioner has always insisted on original import, ensuring the overall quality and experience.