FWIW... CNet claims the Panasonic and Leicas are exactly the same camera other than Leica changing some of the firmware. For example, the JPEGs are less compressed and that makes the write speed slower. And, of course, the price goes up for the Leica label.
If the disaster-prone M8 digital device is any clue, it appears that Leica is having a good deal of trouble moving to digital