When I was flying the SAAB, I was taught to match up the torques. We noted the difference in ITT values, and recorded the trend in those "delta-T's" to monitor engine degradation. Those were GE engines, which of course are not what you flying. Perhaps P&W designed your engines to be flown a different way, but matching ITT does not make sense to me. Torque is pretty much your best measure of power output in the props. Would you intentionally set differential thrust? I'm going to back you up on this one. Of course, some of those old timers bring along the baggage of the "way it used to be done" and substitute that for the correct way.