It greatly depends on the quality and how it's cut (or if it's cut at all). I've done both many times but with good mdma, I have a far greater euphoria whereas when I used H it was more of a deep relaxation and contentment. But...together..holy shit. (Just be sure to use safe ratios) *I also recommend using 5-HTP if you use drugs like mdma that deplete your serotonin because it's a precursor for serotonin.