Helio Smart Ring Health Tracker vs vivosmart 5 Bands: 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 Contact dermatitis from band degradation or residual manufacturing residues, Bacterial or fungal growth from moisture retention and Silicone degradation and microparticle shedding on the Garmin and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the Garmin is Silicone or elastomer bands, 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.