8U vs 16U

Functionally what is the difference? and is there any advantage to either beyond the cost of the board? There is an approximate $10.00 cost differential, I notice, in scanning Ebay's prices. The difference is there in the Mega 2560's too at the same level. Or are they just 'last years models'?.

Doc

The 16u2 is the same as the 8u2 except it has 8KB more flash. So no real difference for normal use but it has the potential for better USB firmware supporting, for example, USB serial and HID keyboard/mouse/joystick at the same time.

Thank You. and I guess that the 8U's are a great deal, Clones for $16 - $18.00

Doc