Signature Filtered Water Pitcher with 2 Filters vs Culligan 12-Cup Water Filter Pitcher with ZeroWater Technology: which is safer?

Where these two actually differ

• We flag Bacterial growth or biofilm in pitcher housing, Filter media leaching or particulate escape, Filter effectiveness decline and false security and Mold or mildew growth on plastic surfaces on the Kirkland 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 Kirkland.
• The Kirkland is Plastic pitcher body, carbon and ion exchange filter 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.