They should be of the same design and layout, except the Antec is a steel case. I'm pretty sure they're just rebadges from a common manufacturer; can't remember if discussion ever settled for sure exactly who makes these things. As far as quality goes, complaints about either brand is rare at most.
Addendum: Oh, except the plastic front door on the Antecs seem to have an annoying habit of breaking off if you're not careful; that's probably the biggest complaint.