Good Books Good Cook Flexible Chopping Mats vs Silicone Grip Mat: which is safer?

Where these two actually differ

• We flag Phthalates (if PVC composition), Coating degradation and microparticle release, Leachable additives from base polymer and Lack of food-contact certification on the Good Cook and not on the Silikomart.
• We flag Siloxane leaching (low-molecular-weight oligomers), Microparticle shedding from grip surface and Mold or bacterial growth in surface texture on the Silikomart and not on the Good Cook.
• The Good Cook is Flexible silicone or PVC chopping mat, coating unspecified where the Silikomart is silicone rubber grip mat, non-coated, 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 Silikomart is the one to buy.
• We are less certain about the Good Cook grade, at 35% confidence against 82%, because it discloses less.