All in Motion Yoga Mat Rubber vs Iyengar Sticky Yoga Mat 3mm & 4.5mm With Mat Carry Strap - Blue - 3mm: which is safer?

Where these two actually differ

• We flag Natural rubber latex allergen (if natural rubber composition) and Microplastic shedding from surface degradation on the Iyengar Yoga and not on the Iyengar Yoga.
• We flag VOC off-gassing (formaldehyde, toluene, other solvents), Bacterial and mold growth in grip surface and Surface degradation and microfiber/particle release on the Iyengar Yoga and not on the Iyengar Yoga.
• The Iyengar Yoga is Rubber (likely natural or synthetic rubber) where the Iyengar Yoga is PVC or natural rubber base, adhesive grip surface, which is most of the difference in these two grades.
• These two are level, close enough that price and fit should decide it rather than our grade.