Bluetooth Smart Watch - Wearable Devices vs Classic Plus Stainless Steel Magnetic Closure WatchBand for Apple Watch: which is safer?

Where these two actually differ

• We flag Elastomer strap skin irritation or allergic reaction, Plastic housing degradation and particle shedding, Waterproof seal failure and moisture ingress and Battery leakage or thermal runaway (device failure rather than use hazard) on the Lifetrak and not on the X-Doria.
• We flag Nickel leaching from stainless steel on the X-Doria and not on the Lifetrak.
• The Lifetrak is Plastic housing, metal band, elastomer strap 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 Lifetrak grade, at 35% confidence against 82%, because it discloses less.