You could go one step further...
Suppose one contestant ate pasta for a month, and the other ate mostly meat and a small salad for a month, then both loaded up with pasta the night before a marathon?
Different from the requirements of a hundred yard dash.
My point is that many athletes “carbo load” - I know a pasta dinner before a Crew match was a regular occurrence during my college athletic days. Weather efficacious or not according to the latest study - it had a sound biochemical basis that “sugar loading” would not.
Thus I attempted to illustrate a fundamental difference between dietary intake of carbs and dietary intake of sugars.