Looks are everything, aerowise. it couldn't be anything else but looks could it? I don't mean vanity, but the actual shapes of the car.
It all depends on what you can see, to what degree you can see it and what you are looking for.
How the looks work with the suspension is something that you cannot see however.
Toyota had a car last year with winning potential. They cam pretty close with a pole positon, a couple of front rows and some fastest laps. I truly believe it was their management philosophy that was their problem. Strategy wise as well, you could see where they let the car and pilots down with weak pit stop strategy. Bahrain last year could have been a win.
In the hands of the right drivers. the TF109 could have won multiple times. And I am not a toyota fan, but last year was their strongest showing.