Carpet & Rug Protector vs Waterproofing Wax for Leather: which is safer?

Where these two actually differ

• We flag PFAS (fluorinated compounds) in water-repellent matrix, Volatile organic compounds (VOCs) and inhalation during application, Respiratory sensitization from spray particles and Skin or eye contact during application on the Scotchgard 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 Scotchgard.
• The Scotchgard is Proprietary stain/water repellent coating 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 Scotchgard grade, at 45% confidence against 78%, because it discloses less.