Waterproofing Wax for Leather vs Waterproofing: which is safer?

Where these two actually differ

• We flag Respiratory irritation or fume inhalation during application and PFAS in water repellency treatment on the Nikwax and not on the Star brite.
• We flag PFAS (fluorinated water repellents), Volatile organic compounds (VOCs) and solvent exposure, Skin and eye irritation from coating solvents and Coating degradation and reapplication frequency on the Star brite and not on the Nikwax.
• The Nikwax is wax-based waterproofing where the Star brite is Waterproofing coating, composition unspecified, 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 Star brite grade, at 35% confidence against 78%, because it discloses less.