The difference is that Brees led high scoring offenses. Carr gets yardage and then sucks in the red zone. He’s the Julio Jones of QBs. Unfortunately, you score by putting the ball in the endzone, and not getting into the red zone. THAT’S the difference.
There are a plethora of differences, too many to list. One QB is a first ballot HOF’er who’s one of the greatest to ever play the game, the other is not in the same stratosphere. It’s truly an insult to Drew to be compared to Derek Carr in any way.