Leather Grounded Sofa 88" Italian Leather Tufted Seat Bolster Cushions vs Banks Sleeper Sofa Foam: which is safer?

Where these two actually differ

• We flag Heavy metals in leather tanning (chromium, iron, copper), Synthetic dyes and mordants in leather finishing, Polyurethane foam degradation in bolster cushions and Formaldehyde-based adhesives in tufting and seam construction on the Article and not on the Joybird.
• 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 Article.
• The Article is Italian leather, tufted seat, bolster cushions where the Joybird is polyurethane foam, which is most of the difference in these two grades.
• We are less certain about the Article grade, at 35% confidence against 72%, because it discloses less.