What are the features of each Maypure square jaw Botox product?

I am concerned that my overly developed jaw muscles make my impression look harsh, so I am planning to get Botox injections. I would like to know the differences in ingredients and specific characteristics between the domestic Botulax and the imported Xeomin Botox. I have heard that choosing a product with low resistance and high purity is advantageous in the long run; which Botox would be most suitable for a case like mine?

Oh, and do you have salivary gland Botox? It's not on the price list... I'm curious about the price!

I am curious if Maypure verifies the authenticity of the product in person, and I would also like to know how long the discomfort of chewing hard food lasts after the Botox procedure.