Stain Resistant Necktie Silk Blue Polo Horse vs H-mors Twillbi Tie 7cm: which is safer?

Where these two actually differ

• We flag Formaldehyde-releasing resins in stain-resistant finish, Volatile organic compounds (VOCs) from finish or dyes and PFAS in stain-resistant treatment on the Brooks Brothers and not on the Hermès.
• We flag Azo dyes and heavy-metal mordants, Formaldehyde-releasing finishing resins, Residual dye and chemical volatiles and PFAS in water-repellent or stain-resistant coatings on the Hermès and not on the Brooks Brothers.
• The Brooks Brothers is Silk with stain-resistant treatment (composition unspecified) where the Hermès is silk twill, which is most of the difference in these two grades.
• The gap is 65 points, wide enough that this is not a close call, and the Hermès is the one to buy.
• We are less certain about the Brooks Brothers grade, at 42% confidence against 78%, because it discloses less.