^^My friend also described it similarly. He said with E, you're more likely to want to be active and dance around, etc. With Molly, it's more mellow, you feel good, but you'd rather just cuddle with someone haha and chill.
A good point to make, and what my friend told me, molly really can't be pure mdma because the chemist(s) will always cut it with something. it only makes sense.