aluminum braking surface carbon wheels, which kind of the braking surface do you prefer to have ?

aluminum braking surface carbon wheels, which kind of the braking surface do you prefer to have ?

Heat Dissipation:
Brake heat is the first barrier to overcome when designing a reliable carbon clincher rim. It has to be treated first in priority.
Heat dissipation & related issues:

During sustained and hard braking both the rim brake track surface and the pad surfaces can reach +200°C (+392°F). If the rim brake track is not 100% flat and smooth, wide spots in the brake track can concentrate heat up to 250°C (+482°F) in the area between the rim hooks, which also heats the inner tube which is getting into the realm of the resin failing/melting.