Fabric & Leather Duo-Pack vs Heavy Duty Water Shield 2-Pack: which is safer?

Where these two actually differ

• We flag Volatile organic compounds (VOCs) in spray carrier, Skin or eye irritation from direct contact and Residue buildup on treated materials over time on the Nikwax and not on the Scotchgard.
• We flag Inhalation exposure from spray aerosol, Off-gassing or residual odor post-application and Environmental persistence and bioaccumulation (fluorochemical legacy) on the Scotchgard and not on the Nikwax.
• The Nikwax is Fabric and leather waterproofing treatment (wax-based) where the Scotchgard is Proprietary water-repellent coating (likely fluoropolymer-based DWR), which is most of the difference in these two grades.
• The gap is 25 points, wide enough that this is not a close call, and the Nikwax is the one to buy.
• We are less certain about the Scotchgard grade, at 35% confidence against 62%, because it discloses less.