It's cheaper, but it quality parts, the antec neo is made by seasonic.
Wow, why is SeaSonic 620w twice the price of the Anten Neo 620w if they are essentially the same thing... I guess marketing is just weird . Anyways, @OP go with his build because i gave you a overpriced PSU.
It's at a good deal, i'm recommending that psu in all future budget builds, until it runs out of stock, it should be a matter of days, before the antec goes out of stock, or really soon.
I guess it's the deal of the week.