The design of the IdeaCentre B320 hews closely to that of the B520. On both systems, a piano-black bezel frames the display, which sits on top of a cleft, angular speaker bar. Unlike the B520's edge-to-edge glass, the B320's display is recessed into the bezel. Aesthetically the look isn't that different, but functionally the recessed display makes it a bit harder to fit your finger in the B320's corners for touch input.
Touch input is one feature that distinguishes the B320 from HP's Omni 220. I still don't find touch a crucial desktop feature, but you might if you intend to use one of these PCs as a home entertainment kiosk. The Lenovo uses surface acoustic wave touch (SAW) technology, the same as that in Samsung's Series 7 all-in-one. It requires you to press down a bit harder than with resistive or capacitive touch screens, but the accuracy is good once the screen registers your input.