Dpreview posted the full Nikon D600 review. They repeat that “the D600’s sensor is built by Sony, and similar (if not mechanically identical) to the one used in the A99 and RX1 but Nikon insists that it is built to its (Nikon’s) own specifications.”
They also say the: “Nikon significantly undercuts the price of Sony’s recent full-frame offerings – the SLT-A99 and Cyber-shot RX1.” While on paper this is correct we also have to add that:
1) The RX1 price already includes a high quality fixed Zeiss lens! The Nikon D600 is priced at $2100 body only. And beside that the RX1 is a completely different kind of camera…
2) …And so is the Sony A99 that focuses on hybrid still/video performance (and has a weather-sealed body).
Don’t know yet if Sony will ever release a sort of A8x camera with less features to play in the same Nikon D600 and Canon 6D league. Both are selling well according to Amazon (here is the ranking).
The RX1 can be pre ordered at Amazon, Adorama, BHphoto, Wex UK ,Wex Germany, Sonystore DE-UK-FR-IT-ES-NL-SE-FI-CH and more links at Alphacameradeals.
A99 body Amazon, Adorama, BHphoto, Jessops, Wex UK, Wex Germany, Sonystore DE-UK-FR-IT-ES-NL-SE-FI-CH and more links at Alphacameradeals.
Some more bits: Nigel Barker at Discovery Sony. A size comparison with other Alpha cameras by Skygon.