Helio Smart Ring Health Tracker vs Forerunner 255S Smartwatch Band: which is safer?

Where these two actually differ

• We flag Polymer band composition and residual monomers and Bacterial growth in sealed band-case junction on the Amazfit and not on the Garmin.
• We flag Heavy metals in pigments (cadmium, lead), Phthalates in plasticizers, Bacterial/fungal biofilm from moisture trapping and Elastomer degradation and leaching over time on the Garmin and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the Garmin is Silicone and/or elastomer smartwatch band, 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 72%, because it discloses less.