Have you tested that? They have 20% more frontal area per spoke, and although there might be something to gain from the slightly higher fineness ratio, it's going to be offset by a loss due to greater wetted area. Only testing will reveal the net effect.
Ok let me rephrase that:
Why not upgrade all the wheels to dt swiss new aero spokes. Same drag but the stiffness of a 2mm spoke instead of 1.5
Or have you tested that already :)