Everyone is entitled to their own opinion. According to “Blood-Horse” magazine War Admiral was a much greater horse than Seabiscuit, and they settled that one the other way on the track!
I wonder how you would rank Damascus, Buckpasser, and Dr. Fager. (I was there!) Two of the, three or maybe all of them, are at least in the same class as Secretariat. But how would you rank those three, just among themselves? Then maybe think about how stupid your War Admiral-Seabiscuit analogy is.