Vicente Fox -- the former President of Mexico -- knows first-hand ... the coke in the U.S. pales in comparison to the coke in his home country ... the kind you drink, not the kind you snort.
Fox was leaving Boa steakhouse in Hollywood last night ... when we asked why Mexican Coca-Cola tastes SO MUCH BETTER than the American kind.
Without thinking twice ... Fox fired off an explanation ... and it totally makes sense.
So, we gotta ask ...