Wide vs Narrow Stator

The square back Autozone Duralast alternator that was installed in September on 2016 was having a difficult time keeping up with the current demands over the past month. Especially when the ac was selected.
Had the alternator tested at AZ and they agreed that it was bad. The replacement alternator that they got for me, under warranty-no charge has a narrow stator band. From what I have read the wide stator band square back alternators are 60 amp and the narrow stators are 78 amp. I called the reman 800 help line and they were clueless concerning narrow vs wide stators, from what the reman tech says they are all 60 amp.
So from the folks that know,, working from the scramble of parts that alternator reman companies work from, would a narrow stator get one a 78 amp alternator in a typical ED5D088A-D8FD-4F01-9AAA-D75195FD9D17.jpeg reman build?
The narrow stator is on the left, the wide stator alternator that lasted 4 years is on the right.