seasonic made antec HCG 620w modular vs CWT made Adata 650w modular
the adata has better regulation on the 12v rail (powers non-important things in a gaming PC like your CPU, HDD, and GPU)
and the antec's 5v fails a crossload test while the Adata passeshttp://www.techpowerup.com/reviews/Antec/HCG-620M/5.html
is the antec a bad PSU? no, it's a very good PSU. is the Adata better? more or the less the same PSU with minor differences that no user would see. My point? it doesn't matter who makes the PSU. what matters is how well it is made.