If we don't judge Mclaren's engineering team,on this year's car, but on what they did during the years, I really think they can do a car with a better aerodynamic than what Mercedes engineering team can produce.
I don't disagree with you on that. I also don't doubt that Mercedes could come up with a better aero designed car as well,
let me ask the question in another way, do you think McLaren will prefer to be in a postion as the works teams or a customer team ? if the answer is yes then why do you suppose that is, don't you think they see the benfit of being a works team and having detailed information of the things such as
Packaging - Mercedes will have designed their car and engine to fit the packaging of their chassis and used their aero philosophy to help shape the directionof the engine design and vice versa
Power units details - The power units are now more complicated than ever before comprising of about 6 different units that makes up 1 whole power unit, this will have an effect on such things as weight of car, cooling requirements, aero philosophy etc. if McLaren was the works team they will have first hand knowledge of all these. Now am not saying Mercedes won't have provided the information, but they might only have divulged basic info they are required to and held back on some key things that could prove differential.
Fuel - don't forget the engine is being designed with the Petronas fuel in mind, whilst this might not be a big thing but since McLarren use Mobil there could be a few perfomance differentiators here
am sure there are loads of other things I have not mentioned.
point am trying to make is this - if McLaren can build a better car than Mercedes even though they are not the works team, then I can make an educated guess that they would have even built a faster car if they were the wors team. (there is a slight advantage in being a works team)
not sure you get my point