Before every race, you get to choose your Team (or rather, your car).
Different cars offer different reputation bonuses for completing certain objectives during the race.
But I, rather boringly, am constantly drawn to the team with the highest Objective Bonus.
Is there any reason (other than personal preference and variety) not to pick the highest team bonus?
The stat differences seem rather minor and so far I haven't had much difficulty completing the objectives, but I'm fairly early in the game.