That Toyota wheel is interesting, and it makes sense they would put it on the rear. I'm really surprised that teams have not done that before, but is it really for brake cooling or does it help with aero in some way?
You don't get to see the angle of the rear wishbones very often, and you can see that the Redbull does indeed get appreciable negative camber gain on the rear during suspension compression. It's a shame the front tires have to deal with such a horrible camber curve, and it is obvious why they run such dramatic static negative camber (I'm surprised they can get on the brakes as hard as they do). Anytime I run 3-4 degrees negative camber on my street car it feels absolutely horrible under braking, not to mention how much I fight with the steering wheel to keep it going straight over the road crowns.
An interesting pic of the Ferrari nosecone, I think I can just make out the intake scoop on the bottom of the nosecone acting as the inlet for 'hole in the nose'. It looks pretty big, maybe (2in tall x 10in wide).
Since I'm taking fluid mechanics this term, I'll do a little volume flow rate estimate.
Inlet Area (50mm x 250mm) = 0.0125 m^2
Inlet Velocity @ Top Speed (340 km/hr) = 95 m/s
Volume Flow Rate = Ai*Vi = 1.2 m^3/s
Wow! That's over a cubic meter a second is quite a bit. If that can be correlated with the flow rate over/under the wing, that should gain them some appreciable downforce. Although, obviously cornering speeds would be considerably slower. And now that I think about it, wouldn't this effectively increase the drag on the straights? I'm wondering if the difference will be noticeable, Ferrari have always been really fast in a straight line. Although, it might mean that they would also be making that much more power because a lot of the flow is directed at the airbox.
With even more consideration, I think that scoop is setup to take flow from the top of the wing and not the bottom, so it should decrease the high pressure zone on the top of the wing effectively loosing downforce but decreasing drag. Aero is so complicated, it is really hard to know just by looking.
In any case, my bet is on Ferrari.
I love to love Senna.