Hydration Biosensor vs Classic Plus Stainless Steel Magnetic Closure WatchBand for Apple Watch: which is safer?

Where these two actually differ

• We flag Polymer additive leaching (plasticizers, residual monomers), Electrical leachate from conductive coatings or adhesives, Inadequate biocompatibility testing disclosure and Sensor performance degradation and unknown failure byproducts on the Nix Biosensors and not on the X-Doria.
• We flag Nickel leaching from stainless steel on the X-Doria and not on the Nix Biosensors.
• The Nix Biosensors is Biosensor electronics, likely silicone and/or polymer substrate with sensors where the X-Doria is Stainless steel, magnetic closure, 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 Nix Biosensors grade, at 35% confidence against 82%, because it discloses less.