[Lawtonfogle]

I took it to mean that the thing being described by the word endurance is objectively different than the thing being described by the word strength when not being used in the endurance sense. In a way saying that the measurement of a muscle's ability to repeated do the same amount of work before failure is a objectively different than the measurement of a muscle's ability to output a maximum amount of work for a single rep. Or another way, the stat that lets you lift a 1kg weight 200 times is objectively different from the stat that lets you lift a 200kg weight once. Related, but different.

As to if the word strength is objectively different from the word endurance, simply consider that one starts with a 's' and the other with an 'e'.