In order to know the comparisons between Audrey and Phebe's characters one needs to know the story or book in which these characters appear.
Hydrogen sulfide (H2S) Sulfuric acid (H2SO4) Sulfur dioxide (SO2) Iron sulfide (FeS) Thioacetamide (C2H5NS)
Her name is Phebe Buffay...
Buffay. Don't know why I know that. Never liked that show.