This is my experience, your mileage may vary:
Speed, e.g. dexmethylphenidate, crystal meth: Like an adrenaline surge you would never get from anything else. After all, that's 1/2 of what it does, agonizes the adrenal gland, also dopamine receptors. I want to do shit. I don't care what. I pace, I ramble, it's pure energy.
Cocaine: Body buzz from hell. Yeah I speed up, I stay up all night, but I don't care about doing things. Sure, I'll do things if I feel I need to, but I just enjoy it. It's more euphoric to me, as was stated, you feel it all over. Not pure energy, though you do feel a bit wired, the biggest thing is that it's all over you. Snort some, get numb as fuck, I love it. Cola is my favorite, and I am a bonafide tweaker.