Organic Waterproof Mattress Protector vs Premium Mattress Topper: which is safer?

Where these two actually differ

• We flag Waterproof coating off-gassing (VOC/formaldehyde potential), Coating degradation and microfiber shedding, Formaldehyde releasers in textile finishes and Allergic reaction to undisclosed coating components on the Avocado and not on the Helix.
• We flag Volatile Organic Compounds (VOC) off-gassing from polyurethane foam, Polyester cover degradation and microfiber shedding, Polyurethane foam degradation and chemical leaching with age and Water-resistant coating composition (undisclosed) on the Helix and not on the Avocado.
• The Avocado is Organic cotton/poly blend with waterproof barrier coating (unspecified) where the Helix is polyurethane foam, polyester cover, 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 Helix is the one to buy.
• We are less certain about the Avocado grade, at 45% confidence against 72%, because it discloses less.