MDA is very similar to MDMA, and yes it does "dump" serotonin just like MDMA.
MDA is generally more "trippy" than a regular role. Visuals are more common on MDA as well. It can be slightly less euphoric.
There is a cross tolerance, they are very similar in chemical makeup.
I find the MDA comedown to usually be harsher.
And finally, I would treat MDA just the same as MDMA. Space out your rolls.
edit: also, my experience has been that a dose of MDA will last longer than a comparable MDMA dose
MDA is generally more "trippy" than a regular role. Visuals are more common on MDA as well. It can be slightly less euphoric.
There is a cross tolerance, they are very similar in chemical makeup.
I find the MDA comedown to usually be harsher.
And finally, I would treat MDA just the same as MDMA. Space out your rolls.
edit: also, my experience has been that a dose of MDA will last longer than a comparable MDMA dose