SB vs BB who wins?

To remind folks of the original question:

So, take a stroker SB of choice. Call it a 408. Could be 390, or 416. Now take a 383/400/or 413. No stroker big blocks, that's not in the spirit of the experiment.

Top these engines off with a decent set of heads. Nothing wild and exotic, but a good set of well prepped heads your typical dude might run. Appropriate and fairly equivalent supporting valvetrain, intake, exhaust, compression etc.

Which series engine would better, in terms of power and torque production, and why?
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He's really only asking which one makes more power and torque, and why.

Wouldn't an equivalently-prepped set of big block heads perform better than a set of small block heads (regardless if they were both factory cast iron, Edelbrock RPMs, Speedmaster, etc.) - thus more power/torque potential, all else being equal?