well. i dont personally use preworkout boosters ne more because these day my food bill is kinda high heh. but iv used both in the past and i preferred superpump over plasmajet. superpump is your typical cafeeinated, arginine nitricoxide kick in the ass at 5am with methylxanthine stims, vinpocetine/ginko focus enhancers, etc. plasmajet isnt a stimulant at all but rather, it has prolonged vasodilator effects. plasmajet was a bit much for me, the vasodilation/lower blood pressure feel lasted too long for my liking and was actually rather uncomfortable. besides, i think one of the primary ingredients in plasmajet is icariin. icariin is the active ingredient in horney goat weed(epimedium). iv taken both high dose horny goat weed and plasmajet and they both felt similar. only difference is horny goat weed cost MUCCHHH LESSS. thats my 2 cents.