Women's Fresh Foam Arishi v4 Shoes vs Velocity Nitro WTR Men's Running Shoes: which is safer?

Where these two actually differ

• We flag Azo dyes and color-based toxins and Antimony in polyester on the New Balance and not on the Puma.
• We flag DWR coating degradation and potential leachates, Antimony in polyester and synthetic blends and Microplastic shedding from synthetic mesh wear on the Puma and not on the New Balance.
• The New Balance is Mesh upper, Fresh Foam midsole, rubber outsole where the Puma is Synthetic mesh/knit upper with DWR-treated waterproof coating, which is most of the difference in these two grades.
• The gap is 45 points, wide enough that this is not a close call, and the New Balance is the one to buy.
• We are less certain about the Puma grade, at 45% confidence against 72%, because it discloses less.