Your arguments are silly.
You think it is valid to compare apples to oranges.
You can pick the path.. it doesn't matter.. the point is it is the same path.
And if one gets 10 percent better on that day on that path in that weather... they they will have a verrrry similar proportion on another path on another day blah blah blah.
And riding habits of 2 people competing... will be disciplined by the riders for max mileage.
And we already have all the fuel economy data we would ever need for general evaluation of typical motorcycles ridden in their average useage... about 45 mpg as ridden and tested and recorded and printed by many motorcycle magazines all the time.
But that is NOT when ridden for economy... that is hotrodding and high speed mixed with general riding.
You want to ignore the fact that the average motorcycle travels twice the speed of a ped and accelerate at 10 times the rate of the ped (if he so desires).
To compare efficiency you HAVE to ride in the same mode on the same path at the same time.