Banks Sleeper Sofa Foam vs York Deep Seat Slope Arm Slipcovered Sofa: which is safer?

Where these two actually differ

• We flag Volatile Organic Compound (VOC) Off-Gassing, Flame Retardant Chemical Content, Formaldehyde in Adhesives and Binders and Foam Degradation Over Time on the Joybird and not on the Pottery Barn.
• We flag Flame retardant chemicals (brominated or chlorinated legacy types), Formaldehyde-releasing resins in batting, glues, or fabric finishes, Microplastics or synthetic fiber shedding and VOC off-gassing from adhesives and foam on the Pottery Barn and not on the Joybird.
• The Joybird is polyurethane foam where the Pottery Barn is upholstered sofa, slipcover fabric, 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.
• We are less certain about the Pottery Barn grade, at 45% confidence against 72%, because it discloses less.