Airbus emphasises the longer range of the A380 while using up to 17% shorter runways. The A380-800 has of cabin floor space, 49% more than the 747-8, while commentators noted the "downright eerie" lack of engine noise, with the A380 being 50% quieter than a 747-400 on takeoff. Airbus delivered the 100th A380 on 14 March 2013. From 2012, Airbus will offer, as an option, a variant with improved maximum take-off weight allowing for better payload/range performance. The precise increase in maximum take-off weight is still unknown. British Airways and Emirates will be the first customers to take this offer.