>>... I just don't believe the lossless compressed claim. > >Neither do I. If there's no difference at all (apart from file >size) why would Nikon bother keeping the uncompressed option? > They include both so that they do not have to listen to some of their customers whine about file difference that cannot be proved.
The choice allows each of us to simplify our lives. Since you don't believe in lossless compression you can have it your way and I simplify my life because I can store significantly more lossless compressed information than I could otherwise - having it my way.
Giving us the choice saves Nikon the hassles of dealing with either one us!
For myself - 14bit lossless for photos where I want the best quality now and possibly in the future, 12bit Compressed for photos for routine events where I know I will not be trying to pull detail from the shadows and probably will not keep the RAW files for more than to years.