The Nocti has two "problems": Focussing is technically slower (and there the 1m-distance for close ups) and the color recording is a little warmer than all the other Leica-glass. Try to have a test before buying (and You the a part of the lens in the finder...).
The smallest "modern" Leica lenses are the 2,0/40mm CL SUMMICRON (only used) and the recent 2,8/50 ELMAR with near distance 0,7m which records very good.
The Nocti is really fine in low light and if You want less depth in daylight, use grey filters to shoot open, even in the sun, it is great.
So, have fun.