You can only do it on vague grounds, the sort of thing that Denis
Jenkinson tried for with his notion of benchmark drivers. Saying that
so-and-so has more points than Fangio proves nothing at all. Even
having more race wins than Fangio doesn't count for that much when you
have 20 races in a season. Wins per start is more interesting.
Judgement across generations on the basis of numbers is a futile
exercise.