Antec non-modular HCG are made by Delta, Antec semi/modular HCG are built by Seasonic. I own the M12-II 520W bronze and I have to say, this thing has been absolutely rock solid, and cable management was a breeze. Considering that the Antec and the M12-II are differing brands of the same unit, I can't recommend one over the other, other than to say you may want to look at other considerations like warranty and price