Helio Smart Ring Health Tracker vs Gen 2 Air Gift Redemption: 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 RingConn.
• We flag Contact dermatitis from accumulated sweat or residue and Allergic reaction to nickel (if stainless steel contains nickel) on the RingConn and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the RingConn is Smart ring, likely titanium or stainless steel body, 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.