Waterproof Shoe Protectant vs Waterproofing Wax for Leather: which is safer?

Where these two actually differ

• We flag Inhalation exposure to volatile organic compounds (VOCs) and propellant gases, Skin and eye irritation from spray mist or solvent contact, Accumulation of coating residue and potential microcracking on shoe material over repeated and Unknown additives (UV stabilizers, biocides, or silicones) in undisclosed formulation on the Sof Sole and not on the Nikwax.
• We flag Respiratory irritation or fume inhalation during application and PFAS in water repellency treatment on the Nikwax and not on the Sof Sole.
• The Sof Sole is Waterproof spray coating, composition unspecified where the Nikwax is wax-based waterproofing, 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 Sof Sole grade, at 35% confidence against 78%, because it discloses less.