Helio Smart Ring Health Tracker vs Mi Band 8/8 NFC Quick Release Replacement Band Straps Wristbands Accessories Bracelet Fit: 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 Xiaomi.
• We flag Skin irritation from additives or accelerators in elastomer curing and Bacterial growth in porous or degraded elastomer surfaces on the Xiaomi and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the Xiaomi is Silicone or TPU elastomer wristband, 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.