Probably because many pills contain a small amount of amphetamines.
i prefer pills, pure in my experience is mongy.
pills feel different....anybody agree?
Pure is pure - If you have 100mgs of mdma crystal - you crush it up and mix with a nonactive binder (the pure pill you mention) then you still have 100mgs of MDMA.
Lots of 'pure' pills contain caffeine / lot's of people simply take way more Molly than what they are used to via a pressed pill / lot's of people associate the two different drugs with different experiences and expect a different effect.
If your pure MDMA is making you floored / making you feel too heavy etc then add some caffeine to the mix, much better to buy the purest, strongest MDMA you can and cut it yourself to suit your mood.
this sounds logical, i may have to run some experiements
but it would be so hard to do an experiement with the exact circumstances....
and the pure isnt cut or anything.