What are the differences between filing a lawsuit in state or superior court in state of GA

There is no significant difference between appealing a Magistrate decision to State versus Superior Court. The main difference is merely the personality of the particular Superior vs. State Court judges in your county. It is worth noting that some smaller counties do not have a State Court, so your only choice would be Superior Court. Coweta County does have a State Court, so you get to choose whether you want your appeal heard by the Superior or State Court in your county.

This is general information and shouldn't be construed as legal advice. You should always consult a local attorney who is familar with all the details of your case.