I haven't used either. However, I can tell you that Hal Huggins is very knowledgeable about safe amalgam removal. In 1985, he and his wife wrote a book about Amalgam Illness. If you research him on the internet, I'm sure that you would feel more than safe in using him as your dentist. While no dentist is a sure bet, we've all learned that the hard way, I would feel completely confortable going to him. Haven't heard of the other dentist. Maybe someone can comment who went to him or knows someone who went to him.