✔ 最佳答案
FujiFilm instax is much easier to get than Polaroid since it has been discontinued and it's quite hard to find Polaroid films. I think Fujifilm instax is better for taking pictures of people especially mini ones which looks cleaner and prettier. Pictures from Polaroid are more vintage feel.
A little extra information, Polaroid 300 is exactly same thing as Fujifilm Instax 7s, not really sure about the films but the specs are exactly the same.