I own two water ozonators. The A2Z ozone machine which you own that says on the packaging that produces 600 mg/h that I purchase off ebay for $75 a 200 mg/h ozonator I bought from Sota Instrument for $350.
As a rule of thumb the more ozone in the water the more the water tastes like bleach.
My Sota Instruments ozonator supposedly has less mg/h output but has a stronger flavour and makes a more "ozoney" smell in the air.