Since they are all forums in the same industry, I personally feel that there is no difference between professional and unprofessional, but the people in the forum are unprofessional and involve specific people. There are many different people in the forum and there is no comparability.
Generally speaking, Sibo is more popular than Baiteng and seems to be better. However, if you encounter patent problems, you should find a professional patent engineer, whether he is Baiteng or Sibo.