It's not, and this shows the enormous limitations of relying on time. The other race took place at a different time of the day, at a different pace, with horses have all exerted themselves to different extents earlier in the day. It is absolutely true to say there is no way to be sure where he would have finished in the Abbaye (which was not the 'other' race, as that implies what Overdose did was a race, and it wasn't). Everything was different. I am sure there have been handicaps which have produced faster times than Group races run on the same day - does this mean the winner of a handicap would have won the Group race? Of course it doesn't, far from it. Races are run against other horses, not a clock, and certainly not a split screen youtube video.