Ecstasy
Ecstasy are pills that are supposed to contain MDMA but often other adulterants such as DXM, (Meth)Amphetamine, Caffeine, Piperzines, ect. The amount of MDMA that is in a pill can greatly range from 0mg (Bunk) all the way up to 200mg. Pills are given a stamp which is usually a logo for some corporations or they just use random objects. When good pills are created often copy cat pills are made and are usually a lot shittier.
Molly
Molly is MDMA powder in capsule. It is sold usually with 100mg in each capsule but the MDMA is usually cut or impure. The point of molly is to give you a "clean" roll. Molly can also contain adulterants such as DXM, Meth(Amphetamine), Caffeine, and Piperzines but it is much less likely than ecstasy pills. Usually the adulterants are inactive(you can't feel them) but more and more often stuff like BZP powder is being passed off as molly. The last rave I went to someone was selling laundry detergent powder in capsules and passing it off as molly
SO TAKE THIS INFORMATION AND BE SAFE OUT THERE!