How can you think differently. Lets recap here. Now we are only comparing on the track. We arent comparing times, sheet numbers, etc etc.

Ghostzapper
4 Grade I wins (Classic, Vosburgh, Woodward, Metropolitan) He has 9 wins from 11 starts for earnings of $3.4mm. Horse of the year in 2004

Invasor
4 Grade I wins ( Classic, Whitney, Suburban, Pimlico Special) To me these are more prestigous races than what Zapper won. Also, Invasor has 9 wins from 10 starts with earnings of $3.6mm.

Invasor will be crowned HOY of the year for the 2nd time.

So Invasor has won more money and has a better win % and has won more prestigious Grade I races. In addition, he is still racing. Now looking at these two it is pretty even. But, the edge goes to Invasor based "on the track."