Helio Strap Fitness Tracker vs Classic Plus Stainless Steel Magnetic Closure WatchBand for Apple Watch: which is safer?

Where these two actually differ

• We flag Skin sensitization or contact dermatitis from elastomer additives, Nickel or metal leaching from buckles or hardware, Degradation or stickiness over extended use and Bacterial or mold growth under the strap on the Amazfit and not on the X-Doria.
• We flag Nickel leaching from stainless steel on the X-Doria and not on the Amazfit.
• The Amazfit is Elastomer strap, likely silicone or rubber 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 Amazfit grade, at 35% confidence against 82%, because it discloses less.