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H.P. is equal to the rate of work being done. Torque does no work at all unless combined with RPM. Turbo motors can create the torque component at a steady rate and at lower revs. The H.P curve will go up with the revs until the torque falls off to the point where the H.P. peaks. The Turbo thus creates a nice wide power band without extreme RPM. Some believe that naturally aspirated engines are more enjoyable and engaging to drive, probably because the revs need to be kept high and the shifter "rowed" actively to get the same result.
Bottom line to the OP is that if both engines have the same torque curve, the only way for one to make more H.P. is for it to be able to rev higher. But I suspect the actual torque curves are not the same either.
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