I am not really one that revels in comparing great racehorses between one another. My feeling is that once they are in the top 5% of the population, they are good, and the difference between them is so nuanced that comparison ruins its relevancy. For example, I’d counter any comparison between American Pharoah and Secretariat by saying that Secretariat had the benefit of being full of steroids (take it easy….they all were at that time) and less stringent drug testing, while American Pharoah had to deal with a track that has significantly more cushion than what Secretariat was running on.