Specialized vs. S-Works

I’m sure it will ride superbly, but there is no mention of any aero measures on the TCR advanced for 2019.
The 2021 version has aero tube shaping, but still likely to be less aero than any of the pure aero bikes, including the Giant Propel.

A full blown aero bike saves 30w at 35kph in the above example, likely more at a higher speed. #aeroiseverything

You may much prefer the handling of the TCR advanced however.