Rubbish. Sorry but that is plain non-sense. When I bought my lens I had the opportunity of buying ( ie, funds wise ) a asph summilux. I did not.
Why ? I loved the Noctilux but that apart from being expensive, was BIG. and heavy. I loved the bokeh though.
So I searched and searched and settled for the Summilux V3 PRE-ASPH, with renders bokeh much nicer than the ASPH one. Yes indeed, the ASPH is a tad sharper and less contrasty ( I like the v3 better in this aspect actually ) but the bokeh transitions is much more noctilux alike and dreamy in the non-asph than in the asph. So having the possibility of buying a ASPH I actually opted for the non ASPH.
Since images are 1000's words and Im kinda lazy to type on, here's an illustration :
stop it down and its sharp
its great for portraits ( even non human ones )
BOKEHHHHHHHHHHHH
love this lens