Loop Smart Screen-Free Wearable Health Band vs Classic Plus Stainless Steel Magnetic Closure WatchBand for Apple Watch: which is safer?

Where these two actually differ

• We flag Elastomer additives (colorants, antioxidants, plasticizers), Allergenic dyes or pigments in band coloring, Bacterial or fungal growth in band crevices and Thermal degradation of elastomer when overheated on the Polar and not on the X-Doria.
• We flag Nickel leaching from stainless steel on the X-Doria and not on the Polar.
• The Polar is Elastomer band 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 Polar grade, at 35% confidence against 82%, because it discloses less.