Today I rang Clive Peeters at Malvern and learned that the induction stovetop that impressed me so much at the Richmond store was a De Dietrich.
Tonight I used my new Breville benchtop induction cooker to cook a 624 gm beef roast in my Fissler pressure cooker. It was a good deal easier than cooking on my gas stove, because of the consistency of being able to select specific heat levels on the induction cooker. But it was here that it became obvious that the Breville does not have at $169, the range of a De Dietrich induction stovetop.
With the Breville, the lowest heat setting (120w) was too high to stop the pressure cooker from eventually going above its level 2 setting. The big De Dietrich has its lowest setting at 50w. As always, you get what you pay for. Most induction hobs have 10 settings, the De Dietrich has 15.