I'm glad you like the Tanaka.
Takeda's original plan was to transition over to stainless but I'm not sure if he's fully committed yet. I'll ask him. Stainless cladding is a little tricky to hammer. It's a little more brittle and he's had more difficulty doing them with more losses in the forging stage.
There is no difference in sharpening or performance since the core steel is still AS.