It doesn't really matter, as these preworkouts are essentially stims with creatine monohydrate. I've used Maximize V2 in the past, and in fact I still have enough leftover where I use it combined with APS Mesomorph on leg days, just for that extra wave of energy that Maximize provides. APS Mesomorph is the best preworkout I've ever taken. It's a stim based formula as well, so it provides a great amount of energy, but what sets it apart is the inclusion of creatine nitrate, which is incredible for pumps and strength gains. I'm using it now and it flat out works. Not a rep either, so take that for what it's worth. Good luck.