How to tell the difference between MDMA and MDA?

I was wonder, MDA is popular around here now and I am not interested in it,
I don't want to get mix up in between, andy difference?
is MDA safe as MDMA?

yeah, at least it's believe to be. They were also synthesized by the same chemist. I heard Mda is weaker than pure molly, but I think that's the only difference. Idk I've never seen MDA, I'm used to molly

They are almost exactly the same strength. You won't be able to tell which you've got, if you've never done the other for sure. MDA is nowhere near as happy as MDMA, it's got quite a mindfuck to it, MDMA is quite a sober experience. MDA is almost mushroomy. MDMA is just an amazing flood of amazing emotions.

MDA is supposedly more neurotoxic than MDMA, its duration is usually a few hours longer than MDMA as well. Doses are fairly similar but MDA is generally considered slightly more potent. As Writer mentioned if you have limited experience with them, it may be difficult to differentiate the two but if you are rolling beyond 6 hours without any redoses or other drugs thrown in the mix you got MDA or at least not MDMA.

Some differences in qualitative effects ime, is MDMA is generally more of a full on tactile roll, body sensations are stronger. Touch is really amplified and Loud Music at like a rave or concert is more engaging on MDMA where its compelling to dance or sit near a speaker if possible to feel the vibrations from it. MDA exhibits this quality to a much lesser degree but there is still music enhancement. MDMA is generally a more positive oriented emotionally opening experience as where MDA feels good but its a little more toned down. MDA has more visuals, a bit like a low dose of acid, and more rushy but ironically it makes me not want to move around as much usually.