Helio Smart Ring Health Tracker vs Modern Leather Watch Strap for Apple Watch 44mm/45mm/49mm - Brown with black lugs: 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 Nomad.
• We flag Tanning agents and dyes in leather, Formaldehyde resins in finishing coats and Allergenic leather dyes and chromium sensitization on the Nomad and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the Nomad is Leather with metal lugs, 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.