Smart Oven Pro Convection Toaster vs Crispi 4-in-1 Portable Glass Air Fryer Cooking System: which is safer?

Where these two actually differ

• We flag Heating element degradation / oxidation under repeated high heat, Crumb tray and interior dust accumulation and Stainless steel corrosion / leaching under acidic food contact on the Breville and not on the Ninja.
• 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 Breville.
• The Breville is stainless steel exterior; interior crumb tray and heating elements (typical toaster oven construction) where the Ninja is Glass cooking vessel with stainless steel and plastic 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.