When in doubt, put it to the t-test.
Driving by a drive-through coffee shop that advertised "get your energy drink here:" Wait: isn't coffee is for _power_, not energy?
Only if you want it over time!
Hot cocoa delivers energy. Coffee revs up the metabolism so I use the energy quicker, so it is a power regulator. (In real life I only drink coffee when stuck with a night shift or when there doesn't seem to be any courteous way around it. Two cups = quivering eyeballs)