I can't follow?
Yes, the Rocca is stainless steel, so is the 3ONE6, but they are not a stainless steel version of the different geometry DE89.
So what do you mean? That's a non sequitur.
Obviously not the same razor but very similar. The concept is to basically shave the same, technique wise but get a more efficient shave.
I find that the R94 is actually easier to shave with than the DE89 but it provides, a closer shave than the DE89.
I wouldn't call it a clone so much as I would call it an evolution.