"Both the Defender and Grid cases offer tremendous value. The Defender case has lots of features, but is really intended for the budget market. It only comes with a 350W or 400W Power Supply option and one 120mm fan which is rather small. On the other hand, the Grid case has a 700W power supply option, comes with two 120mm fans, is larger, and more stylish. Watch the Video to find out more..." ~3dGameMan.com