Omega X Swatch Mission To Moon Quartz vs Smart Band 9 Active Smartwatch: which is safer?

Where these two actually differ

• We flag Resin band VOC off-gassing, Resin band degradation over time and Nickel leaching from stainless steel case on the Swatch and not on the Xiaomi.
• We flag Plastic band degradation and skin contact, Metal casing corrosion and nickel release and Seal degradation and bacterial growth on the Xiaomi and not on the Swatch.
• The Swatch is Quartz crystal, stainless steel case, resin band where the Xiaomi is Plastic band, metal casing, 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 Xiaomi grade, at 35% confidence against 78%, because it discloses less.