A lot of interesting points were brought up, such as Sec. Having an enormous heart (someone said 3x the size of a normal horse, but I don't know how accurate that is), Seabiscuit being able to psych his competitors out, and their racing styles. Others said Pharlap or Man O' War would've beat them.
I won't pretend to know much about racehorses- that's why I'm posting here.
Who do you think would've won?
I really want to hear everyone's opinions!