I don't think anyone is interested in producing such a high-quality fake Nokia N9. If another company manages to produce such a masterpiece again they will brand it with their name Btw I hope that Jolla will soon reveal such device

Nokia Lumia 800 is very similar as hardware to N9 so they might be using a similar pipeline and same hardware components. I guess that Nokia might have made some minor improvements to the hardware during the manufacturing process and that can explain the minor differences on your newer device.