PEA is the structure that DA, NE, ephedrine, 2Cs and amphetamines are based on.
Amphetamine is essentially just PEA with a methyl group on α, hence A
2Cs are PEA with methoxy groups at 2,5 and in all but one case, a substitution at 4 (aka a para substitution because it's opposite the ethyl group). DOx compounds are amphetamine versions of 2Cs.
If you have a PEA based compound with a lone para substitution on the phenyl group, you'll end up with something either highly unpleasant or highly toxic.
PEAs with the classic 3,4-methylenedioxy are almost always entactogenic
Read PiHKAL if you're interested, there's literally endless permutations of PEAs. Most of them are horrible though. A handful of 2Cs/DOx, mescaline, amphetamine itself, 5-Methyl-MDA, MDMA/MDEA/MDA and maybe methylone if I was really desperate are the only ones I'd touch. The FLY compounds are the worst of the worst, especially Bromo-DragonFLY.
Plain old PEA itself is trash. Avoid. Pathetic half-life and barely active without an MAOI. If you want a good stimulant, just go for plain old amphetamine. Stay far away from all the obscure versions, they just don't sound that worth it from what I've read.