The bargeboard area of the Ferrari is interesting for me...
...in that, for all the talk of low drag, simple design on the Red Bull, the *volume* of bodywork in the front-most box on the Ferrari is actually a lot less than its closest competitors.
This from a few pages back for closer inspection:
Ferrari clearly not using all the space allowed to them in this area. Seems to me (in my simplistic way) to speak of the air already kind of doing what they want and requiring less of a 'brick wall' to move it in this area.
Edit: they do, of course, then have a very large slotted turning vane on the outer edge of the sidepod, so I suppose what they're doing is choosing to do a bit less turning upstream and then use the drag saved (given there'll be a target coefficient) further downstream.