MLGrado
500+ Head-Fier
I would take any previously posted specs about the mini with a grain of salt.
My understanding is the digital engine in the mini will be very similar to the Micro. Therefore as the mini will have the same or similar digital hardware and programming, I think it is pretty safe to assume it will support at LEAST as many formats as the Micro.
The real difference between the Micro and the Mini, as far as sound quality is concerned, is likely to be things like upgraded power supplies and analog parts.