I read yesterday somewhere that if you compared American Pharaoh's Belmont time to Secretariat's, Secretariat wins by 15 lengths.
Are you aware that you've misspelled the name? His name is Pharoah because the winner of the name-the-horse contest (run by the owner) spelled it incorrectly and by the time it was realized, the deal was done.
Before the race, there was a link on Drudge's page to an article citing genealogical/physical reasons why Pharoah wouldn't win. I looked for it after and, of course, it was gone. I laugh -- experts.