Range is Best Miles per Gallon or Nautical Miles per KG.
Endurance is minimum fuel flow (Time aloft)
As a hypothetical example:
Endurance Speed 200 Knots at 1000 kg per hour.
Range 220 Knots at 1050 kg per hour.
by travelling 10% faster fuel flow is increased by 5% so less fuel for the trip (assuming nil wind) but will run out of fuel sooner.
W1