I would say the Chieftec is steel because they have another aluminum Chieftec case of the same series listed for 60 dollars. The Antec is most likely made by Chieftec and will have the same exact quality of contruction, just a slightly different front panel and better/different paint job. I would most certainly get the Chieftec. You can get one at buyxtremegear.com for less though. Shipping is 17 dollars and the case is I think 30-35 dollars. I got mine there and everything went well, but other people have had trouble and have had successes like mine.