The Earth is not a sphere.
The difference being 26 Miles or 42 Kilometers. Which interstingly is a marathon distance, so as far as a really fit man can run in a little over two hours.
Of course for all practical purposes this effects absolutely nothing, as far as I am aware not even NASA has to alter any calculations for launches, orbits or manoeuvres of spacecraft, or satellites. Though I guess it might influence precisely where Lagrange points fall, perhaps by as much as a millimeter.
So this is truly useless information