Helio Smart Ring Health Tracker vs Air Active Band, Large - Berry: 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 Google.
• We flag Bacterial or fungal growth on band material, Elastomer degradation and microparticle shedding and Undisclosed additives in elastomer formulation on the Google and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the Google is Elastomer band, likely silicone or TPE, 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.