It seems that with a motor with less inductance, the switching frequency will increase as well. This is why each stepper driver system needs to be “tuned” to the motor. If the motor inductance is different, so will its Ldi/dt be different. At the end it is this Ldi/dt which defines the TIME_ON period of the current chopping waveform...

These dives, being fairly good quality might be capable of running these motors however... time for a message to technical support!