Anytime you deal with a fluid you have two things to factor in, flow pressure, and flow velocity. Your smaller turbo is simply pushing the 22psi into the motor more slowly. The higher flow velocity of the intake charge, the more power youre going to make. Think about electricity, with voltage and current. Your flow rate is Voltage, your pressure is current. You can have 50,000 volts at .1 amp, or 100amps. Its still 50,000 volts, but one is going to kill you when you get shocked lol. In your case, its the opposite. The "current" is the same, but the voltages are different... well thats a no brainer... the one pushing more CFM is going to make more power.