Are any of the three poisons considered stronger or more difficult to break than the others?

Are any of the three poisons (unwholesome roots) of greed, hatred and delusion considered stronger or more difficult to break than the others. Or are they all seen as equally difficult to break, perhaps only differing in strength depending on the individual. I'm interested in teachings from any of the schools of Buddhism about this. I'm not really asking for personal perspectives but rather specific advice from established teachers of the Buddhist schools.