Possibly, It def seems to me though that some MDMA is of just so much more a crystal clear, energetic, love everyone/everything, music just so perfect, thought patterns NOT MUNTED, but hightened. Everything just seems so the best and wonderful it could possibly be. With very little come down the next day, if anything just a warm afterglow.
While other MDMA still loved up, love everything, music great, but the mind is munted, not in a bad way but def not the crystal sclera clarity , and the comedown is harsher, while still a great experience not beyond belief like the real good stuff.
My understanding is that they are different chemical precursors and different paths one can take to get to MDMA, and maybe the way it breaks down in the mind differs from these diffent ways of producing it. Plus, different levels of impurities left, and different race mixes of the same chemical.
I could be wrong but that's the way I see it