Reverse Osmosis Water Filter vs Culligan 12-Cup Water Filter Pitcher with ZeroWater Technology: which is safer?

Where these two actually differ

• We flag Bacterial growth in storage tank or tubing if maintenance neglected, Resin and carbon fines in filtered water during initial use, Membrane degradation or crack leading to unfiltered water bypass and Housing or connector leaks causing water damage or stagnation on the Philips and not on the ZeroWater.
• We flag Bacterial growth in reservoir if filter unmaintained or water stored too long, Filter cartridge degradation and particle escape if overfilled or misseated and Ion-exchange resin saturation without visible warning on the ZeroWater and not on the Philips.
• The Philips is Reverse osmosis membrane, carbon/resin filtration media where the ZeroWater is Activated carbon and ion-exchange resin filter media, which is most of the difference in these two grades.
• These two are 5 points apart, close enough that price and fit should decide it rather than our grade.