No, all drugs are not treated equally. Individuals who are accused of sale or trafficking in certain types of drugs, for instance, Heroin, are going to be treated much more severely than an individual that may possess a large quantity of marijuana.
The law allows for the different types of punishments, depending upon what type of illicit drug you have, and what you’re doing with that illicit drug; whether or not it’s for sale, whether or not you’re manufacturing it, whether or not you are distributing it, or whether or not you’re trafficking in the same. No, the law will not treat every individual, with any type of different type of drug, the same.