AN doesn't like to waste research and concept refinement, in statements he's made. Unless good reason, expect a development on this car to be the route.
Like pebbles on a beach, all rounded, and river delta etc, physics will largely pull these things in the same direction.
Also, the restriction on CFD and tunnel that RB & the leading teams are now variously encountering, if they can get intelligent, half verified small development into the car, then the best wind tunnel without correlation issues is to run it on the track
with each item verified against their current peers. Public in view, but oh so valuable nevertheless, and just adds to development pace.
I think likely to see more additions over the next half year in readiness as proof of their value going onto next years car. Toto has even said as much in regard to his own team approach.