It is possible to have less exposure to self employment taxes as an owner of an S corp, rather than an LLC. However, this is but one of numerous issues one should consider when choosing an entity.
There are pros and cons to using an LLC in your situation. You should consult with a business attorney directly to discuss more detail about your company, the goals for your company, and how different business structures may effect those goals.
You should meet with and schedule a consultation with an attorney who can review your documents and discuss your case in depth. You should not view any advice I have given as that of your attorney or creating an attorney client relationship, but only for the purpose of assisting you in finding help you need in your area.