Brazil (1984–1994) against France (1980–1993)
Alain Prost wins this one without much argument: more titles (4 against 3) and a clearer edge in dominance once scaled against their competition, averaging 41% of the maximum possible points per season against 37% for Ayrton Senna. The picture isn't entirely one-sided though: Ayrton Senna shows a better pole rate (40.4% against 16.6%), while Alain Prost keeps the edge in win rate (25.6% against 25.5%), podium rate (53.3% against 49.7%), and reliability (29.6% against 37.9% in DNFs). Same team, same equipment: 1988, 1989. Race by race, Ayrton Senna came out on top 17 times against 13. A reminder that a single season on equal equipment doesn't tell the whole story of a full career comparison.