There you have it metro man.
2000kg/hr or 2100kg/hr
6000kg/hr or 6100kg/hr
Most pilots have no idea what the most minuscule change in fuel flows can do to the bottom line. It is in no uncertain terms massive.
A long term happy pilot force will create miracles. The first Airline to understand this will see millions of dollars suddenly appear.
I'm not holding my breath.