Crispi 4-in-1 Portable Glass Air Fryer Cooking System vs DiamondForce Nonstick XL 5 Quart Digital 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 Oster.
• We flag PTFE thermal fume emission risk, Nonstick coating degradation and particle ingestion and Polymer off-gassing during initial use on the Oster and not on the Ninja.
• The Ninja is Glass cooking vessel with stainless steel and plastic components where the Oster is Nonstick coating (DiamondForce brand, unspecified polymer), which is most of the difference in these two grades.
• The gap is 60 points, wide enough that this is not a close call, and the Ninja is the one to buy.
• We are less certain about the Oster grade, at 35% confidence against 75%, because it discloses less.