Reverse Osmosis System (generic) 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 and tubing, Housing plastic leachables (BPA, phthalates, or other additives), Semipermeable membrane integrity failure and Chlorine damage to membrane and pre-filters on the Generic 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 Generic.
• These two are level, close enough that price and fit should decide it rather than our grade.
• We are less certain about the ZeroWater grade, at 72% confidence against 100%, because it discloses less.