Look at capacity, the number of cooking functions, and the type of convection system each model uses. Temperature range and precision, preset programs, and extra accessories like rotisserie spits or dehydration trays also matter. Finally, compare price against the features you actually need for your household size.

The Breville offers a larger interior and 13 dedicated cooking functions, including a dedicated dehydrate mode, while the Ninja Flip provides 8 functions but saves space with its flip‑up design. Breville’s Element iQ system uses five quartz elements for precise heat distribution, whereas Ninja relies on OvenCrisp infrared and rapid air circulation. If you need more versatility and a bigger cooking volume, Breville is the stronger choice; if countertop space is limited, Ninja wins.

The Chefman 12‑quart 6‑in‑1 Air Fryer Oven and the Emeril Lagasse Dual‑Zone 25‑qt combo both target big households, but Chefman includes 12 presets, a rotisserie, and a lower price point. The Dual‑Zone model adds a second temperature zone for simultaneous cooking, which can be handy but raises the cost. For most families, Chefman delivers comparable capacity and features at a more budget‑friendly price.

Dual‑zone ovens let you cook two dishes at different temperatures at the same time, which can reduce overall meal prep time for complex menus. They also often include advanced syncing technology to finish both dishes together. If you frequently prepare multi‑component meals, the convenience can justify the higher price; otherwise a single‑zone model will usually suffice.

Super Convection, found in the Breville, uses a high‑speed fan plus two fan speeds to push more hot air, delivering faster crisping and reduced cooking times. Smart Surround Convection, used by Ninja’s Prestige models, surrounds food with heat from both the front and rear for even browning on two levels. Both technologies produce excellent results, but Super Convection may edge out in speed, while Smart Surround excels at uniform cooking across larger trays.

Models with stainless‑steel interiors like the Cuisinart and Emeril Lagasse French‑door ovens feature removable crumb trays and non‑stick surfaces that wipe clean easily. The Breville includes an interior light but requires more careful cleaning of its quartz elements. Ninja’s Flip and Prestige ovens have dishwasher‑safe accessories, making routine cleanup quicker.

Yes, most units—Chefman, Cosori, and Ninja—offer 10‑plus one‑touch presets that automatically set temperature, time, and fan speed. This reduces guesswork and helps achieve consistent results without manual adjustments. For users who enjoy experimenting, the Breville still provides manual controls alongside its presets.

The Breville Smart Oven Air Fryer Pro uses digital PID temperature control, offering accurate heat placement and minimal cold spots. The Midea Flexify also boasts 5‑degree Fahrenheit increments, providing fine‑tuned adjustments. While most models reach 450 °F, Breville’s PID system generally delivers the tightest temperature consistency.