Both are supposed to give a stimulant effect without the stimulant feeling. Wakefulness and memory enhancement. I have taken a high dose for 2 days in a row. The wakefulness is certainly there but no feeling of stimulant but the effect i am looking for from a stimulant if that makes sense. I cant speak to memory because its only day two but I will update as time goes on. I prefer this feeling vs an amphetamine feeling however if I was taking some type of downer im not sure this would be strong enough to keep me up. was ordered from PureRawz dot co