Acoustic Guitar Strings XS 80/20 Bronze Coated vs 3123 Coated Super Slinky Electric Guitar Strings: which is safer?

Where these two actually differ

• We flag Coating degradation and particulate release and Allergic contact dermatitis (copper sensitivity) on the D'Addario and not on the Ernie Ball.
• We flag Nickel contact dermatitis and Proprietary coating chemistry (non-PFAS hazards) on the Ernie Ball and not on the D'Addario.
• The D'Addario is 80/20 Bronze (copper-tin alloy) with phosphor-bronze coating where the Ernie Ball is Nickel-plated steel core with proprietary polymer coating, which is most of the difference in these two grades.
• The gap is 35 points, wide enough that this is not a close call, and the D'Addario is the one to buy.
• We are less certain about the Ernie Ball grade, at 45% confidence against 82%, because it discloses less.