What is the difference between Mitsubishi Heavy Industries Air Conditioning & Mitsubishi Electric Air conditioning?

Mitsubishi HI Air conditioning and Mitsubishi Electric air conditioning are two rival companies operating under Mitsubishi's three diamond logo. The Mitsubishi group of companies form a loose entity of independently operated Japanese companies which share the Mitsubishi brand name. Whilst the companies are autonomous, they share the brand name and trademark, as well as a common legacy. This seems to be the Mitsubishi way, let the smaller subsidiary companies have more control over what would be a gigantic business to manage. Mitsubishi Heavy Industries is Japan's largest shipbuilding and machinery maker and is a mammoth company involved in an array of industrial concerns. With nearly 150 subsidiaries, Mitsubishi Heavy Industries (MHI) operates in 11 key sectors. Shipbuilding, Air-Conditioning and Refrigeration Systems, Nuclear Energy Systems, General Machinery and Components, Paper and Printing Machinery, Steel Structures and Construction, Machinery and Plants, Machine Tools, Power Systems, Aerospace Systems, and Industrial Machinery--and produces everything from cruise ships and oil tankers, to construction machinery, newsprint machines, turbines, airplanes, gasoline engines, and gear cutting machines.