Polarity of the voltage drop on inductance
It makes no sense to look at time varying aspects of the phasor world. Phasors don't have time, they are snapshots in time. The phasor convention deals with sources at their maximum (the real part) and the phase differences with respect to one another (the complex part). So it doesn't make sense to use a phasor equation to try and find what the time varying aspect of the magnetic field in an inductor, use the inductor equation for that.