It is essentially going to come down to whether you like DMAA or AMP. I have yet to try DMAA, but do have a product with it on hand. I have used AMP in the past and I love it. I still have PWOs with it in my stash. I find that the energy is not overbearing and the focus I get from it is just like tunnel vision. I know others on here have had the two ingredients and prefer AMP.