Sealants are synthetic while waxes are mostly organic. And sealants usually come in spray form, while waxes usually come in a paste. Today with thousands of different products out there, they all come mixed and matched.
You can compare waxes vs sealants vs ceramic coatings vs PPF here:
https://www.ceramiccoatexpert.com/po...sealant-vs-ppf
You'' get more info on what each is, how it protects the paint of your car and how it stacks against the others. From there you'll have much more info to work with and you'll be able to make a better decision on what's best for your car.