Originally Posted by Enthalpic
A monster has 160mg of caffeine, brewed coffee has 80-135mg.
Interestingly one study found that taking caffeine by drinking coffee did not have as strong of a performance enhancing effect as an equal amount of caffeine from isolated supplements. Some other, yet unknown, compound in the coffee interferes.
Purely anecdotal, but for me caffeine in the form of pills, tea, or beverages other than coffee make me nauseous and jittery.