The heel may be a sufficient element for me to infer that the adidas designer hypothetically could have been inspired by Nike shoes. Because the heel is a very distinctive Adizero line, like the prominent heel of the Nike shoe. If I had analyzed the Nike shoe in the 80s, maybe I would have found that this element of the heel is very cool to be applied to a line of shoes. And of course I would not do an exact copy of the Nike shoe.
Read again this: I’m just speculating. I made a few strokes to find the cause I see those within the same aesthetics family.