No, but both are quite toxic. Both are category 3 toxins for oral ingestion, but pyrogallol is a category 4 (harmful with very short exposures) for dermal and inhalation, while catechol is less toxic for these routes. The MSDS shows catechol as a category 2 health hazard and pyrogallol as category 3. Catechol occurs in nature from many sources at concentrations not much less than fully diluted developer. Pyrogallol is a neurotoxin, but catechol is not. Both are harmful, given sufficient doses, to the kidneys and liver. Catechol is a moderate carcinogen promoter, especially in the presence of Cu(II); pyrogallol is a mutagen. It takes a considerable chronic dosage in susceptible strains of laboratory animals for either of these effects to be noticeable statistically. Both have been used with reasonable care by photographers for over a century with no notable health effects.