First of all, their molecular structures are different, and the difference of chlorine atoms lies in their great differences in stability.

Secondly, their transparency is different. Because the former is amorphous plastic, the transparency is higher. The outer packaging of cigarette cases and cake boxes is made of PVC (polyvinyl chloride), but its food quality is not as high as PE (polyethylene).

Thirdly, because PVC is lively and easy to color, it is mostly used to produce printed products such as wallpaper.

Compared with PVC, PE film in agricultural greenhouse is easy to produce fog drops, and chlorine atoms in PVC will rot plant leaves.

That's about it. I hope it works for you.