Crispi 4-in-1 Portable Glass Air Fryer Cooking System vs Crispi Pro 6-in-1 Glass Air Fryer: which is safer?

Where these two actually differ

• We flag Thermal fracture or stress in glass cooking vessel, Plastic housing off-gassing (VOCs and formaldehyde) and Electrical hazard or heating element degradation on the Ninja and not on the Ninja.
• We flag Thermal shock / glass breakage risk on the Ninja and not on the Ninja.
• The Ninja is Glass cooking vessel with stainless steel and plastic components where the Ninja is Glass cooking vessel with stainless steel components, 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.