I always feel the Redbulls - (since 2010) have had stiff rear and soft front end, easier on the tyres for turn in ect. They also use 3rd spring in testing or practice but not for race, its gives them better set up idea's ect (I'm sure i can find the link if someone needs it)
Other than that, The tea tray is superb, The front wing elements are the best the rear is superb. I do feel its the tea tray area doing the job though, Merc are onto whatever they do, whether its cheating or genuis i reckon merc have found a glimpse of it. But not fine tuned it. Thats why the positves for next year in merc camp come from imho.
Rb9 is the best in every area even speed now, I was thinking after spa the team had some sort of DDRS they seemed that quick. And i don't feel much love for vettel, BUT he has been remarkable in those cars which shows given the machinery he is quick and thats what/ you need to be in F1 or any series.