The low speed torque is a function of the motor controller amperage, with the same current but less turns you will have lower torque. To get the same current though you will need a higher voltage for the higher turn motor, since it has more resistance, so the increased torque isn't for free. If you consider top speed only for the same voltage and current, the higher turn motor will indeed go faster, but it will also heat up faster, so its also not for free. You can get the lower turn motor to go just as fast by increasing the phase current.
A.
A.