Crispi 4-in-1 Portable Glass Air Fryer Cooking System vs Countertop Combi Oven with Air Fry & Steam: 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 Siemens.
• We flag Steam circuit bacterial growth, Formaldehyde or VOC off-gassing from seals and insulation and Mineral deposit accumulation in heating circuit on the Siemens and not on the Ninja.
• The Ninja is Glass cooking vessel with stainless steel and plastic components where the Siemens is Stainless steel cavity, heating elements, steam/air circulation, which is most of the difference in these two grades.
• The gap is 40 points, wide enough that this is not a close call, and the Ninja is the one to buy.