That's a problem when the same model name is used for very different bikes, Kalkhoff have done similar with the Agattu model, both hub and crank drive versions at times. However a Google search here in the UK shows the hub motor version under a different model name, Sparta RX, not Sparta Ion. Since it's clearly not the long standing rear motor Ion model, little is going to be known about this newer introduction.
As you say, the 200 watts is just to conform to Australian national law. Elsewhere that hub motor is listed as 250 watts and anyway will deliver well over either figure in practice. I know the State of Victoria wanted to introduce EU law but I don't know if they've approved the change yet, and have no information on what other states might be doing. Hopefully Australia won't end up like the USA where there are almost as many different e-bike laws as there are states.