We've all heard the stories from McLaren that you can't win against a constructor with their customer engine, hence why McLaren left Merc and went to Honda.
Is it assumed that customer teams are getting different engine maps/software to the Mercedes team?
If that is the case then that would ensure that the Mercedes customer teams are always a little bit behind the works team.
But given the increase in performance of Ferrari this year, is it possible that Mercedes have provided better mapping/software to Williams in the hope that rather than having red cars biting at their heels, it will be other Mercedes powered cars?
Just an idea maybe worth discussing?