World Market Joseph Joseph Pop Reversible Chopping Mats vs Silicone Grip Mat: which is safer?

Where these two actually differ

• We flag Polypropylene base leaching (heat exposure), Silicone coating degradation and particle shedding, Unspecified coating on PP base and Bacterial growth if not cleaned properly on the Joseph Joseph 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 Joseph Joseph.
• The Joseph Joseph is Silicone and polypropylene mat base, 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 Joseph Joseph grade, at 35% confidence against 82%, because it discloses less.