ATCO needs help from pilots: performance data

[FlightDetent]

They should be identical, the wing and rest of the airframe are the same save a few tweaks. The efficiency of the engine (low fuel burn) and lease rates on new toys (redhot high) would traditionally suggest a faster speed schedule to reach the optimum cost equilibrium. Yet there is a long list of reasons which could topple that logic completely upside down. I do not have any relevant personal experience.

To re-iterate, the gold range always sits inside the green band. The gold band is the pilot's preferred choice in accordance with airline policies. Those may as well require different speeds every now and then, but it is impossible to systematically predict when the need comes. NEO or not.

edit: The CLIMB performance is significantly better although there have been some administrative thrust limitations since the engines are designed very delicate and not all the hardware is yet optimized.