What are the chances the capture software is removing specific items like road markings and adding them back in slowly as they get closer? If these are the same in game settings then either a bug is not enabling the higher settings on the Titan X or Nvidia is purposefully reducing settings via the driver to enhance performance at the same settings. either way, Nvidia has higher performance in the comparison while offering significantly reduced IQ. You can only really presume that making everything look sharper and increasing draw distance will impact performance.
THe question is, is it the game, or is it Nvidia and if it's Nvidia, what other games are faster but worse looking?