it seems with blinky and larger rollouts the higher torque rotor is a benefit compared to boosted where smaller rollouts and higher rpm benefits from the lower torque rotor.
although for the life of me i can't see how more torque can ever be a bad thing so it must be that the higher torque rotor somehow limits rpm?
Yes, a stronger or larger diameter rotor has more natural drag against the iron stator stack, which limits RPM. This effect is most noticeable off-power as drag brake. Yet another reason why optimum gearing ultimately comes down to each individual motor.