Helio Smart Ring Health Tracker vs Women's Stella Watch: 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 Fossil.
• We flag Chromium in leather tanning residues, Formaldehyde in leather finishing or fabric adhesives, Azo dyes in synthetic fabric straps and Glass crystal breakage and sharp edges on the Fossil and not on the Amazfit.
• The Amazfit is Titanium alloy case, polymer band where the Fossil is Stainless steel case, mineral or hardened glass crystal, leather or fabric strap, 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.