Zenieth is incorrect (or at least he was given incorrect information :-)
A friend of mine who is buying a new Prima called the distributor in Canada to ask about it. He was told it has, among other things, a completely different transport (Sony instead of Philips), a new, better power supply, Black Diamond Racing cone feet (which they didn't have before), and, yes, new looks with sculpted face plate.
It's supposed to sound noticeably better than the previous Prima model.