Boeing is (was?) known for their wing technology, especially with using the wings as a shock absorber. Airbus was known for the opposite (rigid wings). I know that I used to be able to tell a difference between an Airbus and Boeing plane (737 and A320) just by how it felt in flight. The numbers I remember hearing is that Boeing wings deflect twice as far as Airbus, hence the smoother flight (not counting turbulence). Of course, as a Boeing employee, all of the info might be brown and stinky due to the source.