I can see what you mean by the two nearly identical cases. Off the bat, I know that Rosewill is more of a reputable brand than aerocool, so I’ll give you that. Otherwise, the rose will one has bright blue led fans in front while the other has either regular fans or slight red led fans up front. Also, the aerocool is considered an e-atx case while the rosewill one is regular atx, but both fit e-atx mobos as well as all of the other ones (atx, matx, Mini itx). As a bonus, Newegg is giving away a wireless surveillance camera for free if you purchase the rosewill one, if you’re into that.