Well tweedle dee! I've got both cases! Well, not exactly, but very similar. Here's what I can tell you about both cases.
The Antec has a removable HDD cage ( very nice ) slide rails for the drives ( never have to take the other side of the case off to install drives ) and is built very sturdy. The front comes completely off with minimal effort. It's heavy if it is the steel model, but you won't worry about breaking the case if you work on it. The finish is extremely durable, but has a texture to it-so if you want to paint it and have a smooth finish, be prepared to do some serious sanding. All in all, great case....awesome cooling capabilities ( total of 6 possible fans which includes the 1 fan on the PS )
The Enermax case: They have a nice range of cases offered. The wifes case came with a side case fan, and a mount for a blowhole fan. You can easily mount a 120mm fan in front if you want. The front of the case is more difficult to remove, so if you plan on doing work behind the front case, do all of it at once. Some of their cases come with nice thumbscrews, some don't . The case is extremely light, and all drives need to be screwed to the case which means you will have to remove the backside of the case to access the screw holes for your drives. Decent room, didn't have issues with sharp edges. Total case fan count runs to 6 fans-blowhole, PS, front, side, 2 in rear....all 80mm with the exception of optional 92-120mm front fan.
Haven't had an issue with the PS in either..both seem to run strong. You can hear the fans in my wifes case ( 5 ) but mostly just the air movement, so it's relatively quiet considering.
Negatives....My antec is Heavy...damn Heavy...built like a tank. But when you put it together, it all fits together the first time, everytime.
The Enermax is lightweight aluminum, which means that body panels will flex making side cover installations somewhat tedious, but not impossible. You just have to be patient, and understand how it interlocks with the case.
Hope this helps you out.