Look first at capacity; a 6‑quart pot is ideal for families, while a 4‑quart model suits couples or single cooks. Next, compare the number of preset programs and the flexibility of lids – two removable lids let you switch between pressure cooking and air frying without extra accessories. Finally, consider safety features and the brand’s reputation for reliability.

Both offer 11 cooking functions and EvenCrisp technology, but the Pro Crisp includes status lights that show each cooking stage at a glance. The Duo Crisp focuses on customizable smart programs, while the Pro Crisp emphasizes dual‑lid flexibility for quicker lid changes. Price‑wise they sit in a similar range, so your decision may hinge on which interface you prefer.

Nuwave Duet units boast a massive preset library (up to 540‑in‑1) and Dynamic Pressure Control for faster, more nutrient‑rich cooking, which can justify the premium for power users. They also feature a triple‑thick stainless inner pot and extensive safety systems. If you only need basic air‑fry and pressure‑cook functions, an Instant Pot may offer better value.

The Instant Pot Duo Crisp 11‑in‑1 with its 6‑quart capacity and 11 one‑touch programs provides solid performance at a moderate price. The Ninja Combi All‑in‑One also serves large families with its 14‑in‑1 versatility and quick 15‑minute complete meals, though it’s slightly pricier. Both handle a whole chicken or a big batch of fries, but the Ninja adds a built‑in oven function for extra flexibility.

All listed models use rapid air circulation to achieve a crisp texture with up to 95% less oil, but Nuwave’s Combo Cook technology starts with pressure cooking then finishes with air frying for extra tenderness. Instant Pot’s EvenCrisp focuses on consistent crunch, while Ninja’s HyperSteam‑Air Fry blend aims for juicier interiors. Real‑world results are similar; personal preference for control interfaces often decides the winner.

If you enjoy specialty dishes, models such as the Instant Pot Duo Crisp Ultimate (13‑in‑1) and Ninja Foodi include sous‑vide and yogurt functions, expanding your culinary repertoire. For everyday meals, the core functions—pressure cook, slow cook, air fry, bake, and roast—cover most needs. Adding niche modes may increase cost, so assess how often you’ll use them before paying extra.

Stainless‑steel inner pots, like those in the Nuwave Duet series, are dishwasher‑safe and resistant to staining. Instant Pot models typically have a non‑stick inner pot that also cleans easily but may wear over time. The Ninja Combi’s pan doubles as a serving dish, reducing extra cookware, and all its accessories are dishwasher‑friendly, making it a strong contender for low‑maintenance kitchens.

All units include basic safety mechanisms such as pressure‑release valves and lid‑lock systems. Nuwave Duet models stand out with 15 integrated safety features, including overheat protection and automatic pressure release. Instant Pot and Ninja models also meet industry safety standards, but they provide fewer listed safety redundancies, which may matter to cautious users.