Except that you would need rather more KC-46As to the same work as a smaller number of KC-30s if you were intelligent enough to have realised that in the first place, instead of looking at aircraft numbers!
The fuel burn issue is, frankly, bolleaux. It's like saying the RB211 in the TriStar had a higher fuel burn than in the 747, so was more expensive to operate......except that the 747 had one more engine! A mistake which one airline's
be
ancounters allegedly made...
