Coil Winding Sense of Inductor/Transformers and Output Polarity
Changing the current flow direction in the windings of a coil is the same as reversing the winding rotation direction.

For a transformer, if both coils are wound identically then the polarity in the secondary will match the polarity in the primary. Imagine you wind two parallel windings and connected the two coils together - you wouldn't suddenly find that there is any problem with this - litz wire relies on this of course. If you open circuited one of those paralleled coils while still applying voltage to the other, you'd find the voltages were the same polarity and virtually indisinguishable for each other when tightly coupled.