mm vs mmm why does one make more power?

[Arct1k]

A theory why this might be true in some cases.

The MMM has a lower resistance and allows the motor to pull more current - In situations where the battery can support this you would have more "punch" however if the batteries can't keep up then the voltage could drop and perhaps feel like it has less punch - The MM might not pull so hard from the batteries in which case might feel better.

Its a theory anyway...