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Take it with a grain of salt, but here's my reasoning:
The Insight's ECA1 is a VTEC(-e) motor, which opens the second intake valve wider after VTEC engagement, which is somewhere between 2500 and 3200RPM depending on load. This gives the engine two torque curves, one that peaks somewhere between 2000RPM and VTEC engagement, and another that peaks at around 4800RPM.
The D16Y7 is a non-VTEC motor, and its torque peaks around 4600RPM, because it has only one cam profile. The cam profile that it has is a compromise between low RPM torque and high RPM torque, which I would imagine would shift BSFC up the RPM band a bit.
Peak BSFC is generally not at peak torque, but there is a relation. Low-RPM combustion efficiency is improved in the ECA1 due to a swirl effect caused by asymmetric opening of intake valves. I can't imagine peak BSFC being at the same RPM in the Y7, so it's more a question of how far up the RPM band it moves.
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