I took 1RM, first workout was great. However your body will grow a tolerance to it much faster than it does to jack3d. In the long run jack3d will be more consistent.
1RM is purely a caffeine buzz, look at the caffeine in it, its gross. It even faintly smells of caffeine. Jack3d gives you more physically beneficial nutrients along with mental focus. 1RM gives you more of a mental focus that will quickly taper off as your body rapidly adapts to the increase of caffeine.