Legacy 18 x 13 Inch PFA Free Nonstick Cookie vs Amazon.com : King Arthur Flour Precut Baking Parchment Paper, Heavy Duty, Professional Grade, Nonstick, Reusable, Reseal: which is safer?

Where these two actually differ

• We flag Nonstick coating degradation over time, Coating fume release at high temperature and Microplastics from coating shedding on the Calphalon and not on the King Arthur Baking.
• We flag Nonstick coating composition (unconfirmed PFAS-free status), Coating degradation and flaking, Heat stability of nonstick layer and Microplastic or particulate shedding on the King Arthur Baking and not on the Calphalon.
• The Calphalon is Steel with PFA-free nonstick coating where the King Arthur Baking is Bleached paper with nonstick coating, composition unspecified, which is most of the difference in these two grades.
• The gap is 70 points, wide enough that this is not a close call, and the Calphalon is the one to buy.
• We are less certain about the King Arthur Baking grade, at 35% confidence against 72%, because it discloses less.