Why are people taking RPM and Drive together? I mean, isn't Drive the same thing as RPM minus the stims? Am I missing something here?
Drive is definitely more than RPM minus stims. Apart from the stims, RPM contains Icariin (50%), L-Arginine, Grape Seed Extract, and Naringin.
RPM should give you the intense focus to attack your workouts, dramatically improve your energy levels in a smooth manner, enhance your vascularity and pumps, suppress your estrogen levels while enhancing your testosterone levels, and finally ensure enhanced fat loss.
Drive on the other hand contains Icariin, Forslean (a patented brand of Forskolin), Dodder Seed (20:1 Cuscuta Chinenses), Naringin, and Cordyceps.
With Drive you should experience improved mood, heightened endurance, pronounced improvements in recovery time, significant and noticeable improvements in lean mass growth and preservation (anti-catabolism), noticeable muscle-hardening, pronounced aromatase-inhibition activity, higher testosterone levels, and overall improvement in sexual performance.
Drive, you see, is much more than RPM without methylxanthines/caffeine. Drive and RPM have only Icariin and Naringin in common.
When you combine (stack) RPM and Drive, you should expect (and get) some pretty neat results. That is why people stack them.