Supcase Rugged Buckle Case for Fitbit Ionic,Strap Replacement Bands for Fitbit Ionic Smartwatch vs Water Resistant Watch Model 8R500 - Men: which is safer?

Where these two actually differ

• We flag Bacterial and mold growth and Allergic contact dermatitis from manufacturing residues on the Fitbit and not on the TomTom.
• We flag Polymer case and band degradation and Bacterial or mold growth in seals and band on the TomTom and not on the Fitbit.
• The Fitbit is Silicone, elastomer, stainless steel bands where the TomTom is On watch case and band, 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 TomTom grade, at 35% confidence against 72%, because it discloses less.