Update: now there is a dpreview discussion on this topic and it seems that few other people think that the coating is indeed different. I guess the price difference is not only for the brand name and the jpg processing.
Interesting side-by-side comaprisson between Panasonic LX 3 and Leica D-Lux 4 – it seems that the lenses have different color reflection. Aren’t they suppose to be the same? Maybe this is just a visual illusion? See for yourself and let us know what do you think.