I found the exact opposite was true for me. Peevee is like a warm, fuzzy, comfy ol' jumper that fits me perfectly. This NRG-1 stuff was the most oddly cold drug I've ever taken. Physically I got more speedy spine-tingles than on peevee - albeit it very short-lived - but mentally I was utterly blank. Isn't it vaguely related to SSRIs? Not 100% about that but felt strangely akin to them for me - not up, not down, not unpleasant, not pleasant, not happy, not sad, just cold, hollow and empty inside. I literally felt nothing whilst on it. Very strange substance indeed.
As for comedown/aftereffects, I didn't really notice anything much. I could sleep fine even after a gram over 12 hours and felt fine the next day - surprisingly chipper in fact. My doses were approximately four times as high as my peevee doses and it lasted approximately a quarter as long which is what I based my estimate of potency on. It's quite possible (probable) that it was cut but who knows? Just another anonymous white powder wannabe with no future as far as I can see.
Also worth a mention is the effect it had on MDMA. I had 100mg of pretty decent crystal left from the gram I recently managed to acquire (woot! MDMA!

) and decided to use it with the last 30mg of NRG-1. I was experimenting with various ROA with the noob as is my wont and had taken to IVing it attempting to find its vacant soul (which remained elusive even when mainlined). I was hoping that the MDMA would bring out some character in the stuff but quite the opposite - the NRG-1 killed the MDMA stone dead. Utterly killed it. 100mg of MDMA crystal with 30-35mg of NRG-1 in the same pin and nada - not a sausage. Could feel neither of them in the slightest. Also reminiscent of SSRI in that way. Really don't see the stuff becoming popular recreationally if it's even remotely like SSRIs in its action.
Incidentally, used alone IV (dosed from 20-35mg or so) it gave no real rush but one hell of a lot of intense tachycardia. Also got a nasty attack of the Smurflimb syndrome most of the time I was on it so that's two things going for it as a meph replacement I suppose :D