I think that both have basically the same HP potential, efi is definately a more user friendly system, but when a carb is set up right, it is as good is EFI. The difference is in what it takes to get it set up right. They are just two different ways to do the same thing.
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67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Comp. Cam, Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.
My 351W Fastback