The fact that the problem stays with the motor when you swapped it out, means that the motor is defective. Since you know there is a difference in resistance between the windings, ie one higher, there is an internal fault in the winding of that pole. Because of the high resistance,the ESC is not driving that pole hard enough to to rotate the motor rotor past the magnet on start-up and thus the "shuttering". Probably a manufacturing defect that is not correctable. If you can contact the supplier maybe they will replace it for you. I have had good experiences with such situations. Otherwise you may be out of luck.