I don't have those two exact cartridges, I have the Hana SL and the Soundsmith Aida II, both of which are close to the two you're considering. I have heard the ML at Jim's house and found it to be similar to the SL, just a little more refinement.
I found the description of the Hana sound as "lush" by another poster interesting. I find them to be very neutral "truth tellers" with little embellishment.
The Aida II has more detail and has a wide soundstage but can sound a little "thin". It doesn't have that fullness that most MC carts have. Or maybe I need to work on my setup a little more.
There are a number of threads in the Steve Hoffman forums about Soundsmith cartridges.
I would listen to @tomic601 and consider standing pat on the cartridge. You might consider upgrading your phono stage instead of the cartridge.