I've no specific drag breakdowns for either.
Walter Korff chose Bauman scoops for the Summers Brothers Goldenrod,Cd 0.117.
This Pro Comp hood scoop reduced require horsepower at 200-mph by 150-hp,compared to the exposed 671 Supercharger.
Daimler-Benz chose NACA submerged inlets for their C111 III (Cd 0.178 w/o wings).
Aeronautical engineer,James Bede chose NACA for his road-going fuselage.
ditto,Alex Tremulis,
ditto,Bochum University
Chevrolet wanted to use them for the new Corvette but didn't have enough interior volume inside the quarter panels for their particular architecture,so they just did the best with what they had.
I suspect that the decision comes down to interior packaging constraints.
I suspect that the NACA design is ideal,but doesn't always fit with respect to inflexible project realities.