http://hardforum.com/forumdisplay.php?f=102 Given they exist within the same forum surely someone would've noticed in two years and 200K+ thread views on the Kimera thread.
I can see some similarities between the Cerberus and the NCase. However, the Cerberus supports mATX motherboards but the NCase only mITX boards. There are also some other differences, such as the I/O stuff on the front of the NCase. So, I wouldn't call it a ripoff.
It's pretty much a mATX alternative to NCASE, I wouldn't call it a rip off though. You could call NCASE a ripoff of fractal Design's Define series, but in the end it's just minimalistic, monolithic black box.