MDA lasts around 6-8 hours, is more stoning, and has a rather significant visual component. There's not as much lovey-doveyness or empathy. It's more of a "true" psychedelic.
MDMA lasts around 4 or 5 hours, is more energetic, more feelings of love and empathy, and for most people, at reasonable doses, it does not have a significant visual component.