"world's Most Advanced Health Tracker" 2014 Edition, Carbon vs Classic Plus Stainless Steel Magnetic Closure WatchBand for Apple Watch: which is safer?

Where these two actually differ

• We flag Lithium-polymer battery degradation and leakage, Plasticizer and residual monomer off-gassing from elastomer band, Stainless steel nickel leaching (skin contact) and Microplastics and degradation particulates from aged polymers on the Basis and not on the X-Doria.
• We flag Nickel leaching from stainless steel on the X-Doria and not on the Basis.
• The Basis is Electronics, plastic, stainless steel components 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 Basis grade, at 35% confidence against 82%, because it discloses less.