3M Aqua-Pure AP802B Whole House Filter Housing vs WH-HD200-C Whole House Heavy Duty Water Filter System: which is safer?

Where these two actually differ

• We flag Bacterial growth in spent cartridges, Polypropylene stress fractures under thermal or pressure stress and Cartridge bypass or seal degradation on the Aqua Pure and not on the Culligan.
• We flag Bacterial growth in filter housing if maintenance is deferred, Carbon dust release into water after cartridge installation and Contamination bypass if cartridge seal fails or is installed incorrectly on the Culligan and not on the Aqua Pure.
• The Aqua Pure is polypropylene filter housing, carbon/sediment cartridge where the Culligan is Carbon and sediment filter media; polypropylene housing, which is most of the difference in these two grades.
• These two are level, close enough that price and fit should decide it rather than our grade.