Prost was boringly good but had his limits. The defining moment that differentiated the two was Prost refusing to race in heavy rain at Adelaide '89. Senna was

Prost was boringly good but had his limits. The defining moment that differentiated the two was Prost refusing to race in heavy rain at Adelaide '89. Senna was obviously better in those conditions as that's how he drove. If the car wasn't on the edge of sliding or twitching under accelaration he wasn't going fast enough. Prost was measured and did what was necessary to win. Senna wanted to win and win well.