They are just have different name. In fact, they are actually the same style. And some people called aviator sunglasses as pilot sunglasses is just because the sunglasses style is originated from pilots actually wearing them during World War II. And when it refers to aviator sunglasses, ray ban are consider the best brands for aviator sunglasses.
In my own opinion, I think they have little difference between Aviator and pilot sunglasses. If I have to say the difference, the variety of design differs. For example, the number of Aviator sunglasses with latest designs is larger than those of Pilot. And their designs are cool. Besides that, the quality and price are almost the same.
In fact, between Aviator and Pilot Sunglasses, there is no discernible difference. Both of them are very popular now, and Aviators are a style of sunglasses that are really popular right now, and they are called ''Aviator Sunglasses'' because they are a style that originated from pilots actually wearing them. If you really want to know the difference between them, i think the only answer is that Pilot Sunglasses have their own style and so do Aviator Sunglasses.