사각턱 보톡스 처음 맞아보려는데 일반 국산이랑 내성 적은 제품 중에 뭐가 나을까요?

My jaw muscles tend to feel a bit tight when I clench my molars, so I'm considering getting square jaw Botox for the first time.
Maybe because I haven't tried it even once, but when I actually looked into it, I found there were more types than I expected.
I'm confused whether it would be safe to start with a standard domestic product for the first time, or if it would be better to get a pure toxin like Xeomin or Coretox right from the start, since I've heard that once you get it, you have to keep getting it periodically, so there is no need to worry about resistance.
Also, since it is my first procedure, I am a bit worried about my jaw feeling too stiff or if there might be any side effects like sunken cheeks.
I would appreciate advice from those with experience regarding which product you started with when you first got square jaw Botox, and how the effects and duration were!