Juice Pack Case for iPhone 17 Pro Max vs Multi-Sport Cardio GPS Watch: which is safer?

Where these two actually differ

• We flag Microplastics from case degradation on the Mophie and not on the TomTom.
• We flag Elastomer band degradation and skin contact, Polymer case brittleness under UV and thermal stress and Sweat and salt corrosion of internal components on the TomTom and not on the Mophie.
• The Mophie is Plastic housing where the TomTom is Polymer case, elastomer 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.