The latest 787 Dreamliner and the Airbus Group SE A350 are hastening the retreat by combining twin-jet economics with composite materials that offer a 20 per cent efficiency saving versus planes far newer than the 747.
Refer to the input text as context and select the correct relationship between 'Airbus' and 'A350' from the available options.
Options: product/material produced, manufacturer, stock exchange, director/manager