Which is better, Kone Elevator, Otis Electromechanical and Theo Elevator? Which is the most energy-saving?

Kone elevator butterfly motor technology is more energy-saving. Otis elevator Gen2 series passenger elevator has its own energy feedback function, which can give back 70% of electric energy at the highest and 30% at the lowest during elevator operation! Otis is still using steel belts. Hangzhou ofo is a domestic brand, so I have to choose Otis elevator. Theo and Otis are not in the same class.