I have gone from the Hana ML to the SL on a Clearaudio Performance DC. I have what I consider a pretty revealing system downstream and I heard a clear difference. I really liked the SL but the ML improves everything the SL does well and makes it better. More refined, better detail, separation, and frequency extremes. Bass was clearly better. If your budget allows for it and your system is revealing enough you should hear a difference IMO, at least I did. To what degree will be the question, and it will be system dependent as will all things like this. It's hard with cartridges to demo both on the table you have, but luckily I was able to do that at my dealer before I pulled the trigger on the ML.
To me it's worth the extra $450 at buy in, or trade up (that's what I did).
To me it's worth the extra $450 at buy in, or trade up (that's what I did).