http://www.bloodhorse.com/horse-racing/articles/92491/final-quarter-faster-than-secretaria

With a final quarter-mile dash to the finish even faster than Secretariat, American Pharoah ran into Triple Crown history with a dazzling display of speed and endurance in the Belmont Stakes.

According to this, the total time has Secretariat winning by 2.5 seconds. How far ahead would be determined by the competing horses in both races The final quarter time for Pharaoh was .68 second faster than Secretariat, so the jockey’s holding Am Pharaoh back for most of the racer figures in as well. It takes nothing away from Pharoah’s well deserved accomplishments.