When choosing a brand, you should consider the appearance, cost performance, versatility, etc. Of course, this does not mean that an all-in-one air fryer and oven has only one advantage, but that it has outstanding cost performance, or It's an outstanding appearance.
If we talk about appearance, today’s oven designs are getting better and better. Even Changdi, which has been criticized for a long time, some of its recent models are all about appearance. But among the strong, there will always be a strong one. Everyone is excellent, but there are still some who are top-notch. For example, the all-in-one fried and grilled machine from Midea is the "Chujian" PT3520W, Westinghouse WAF-LZ1210E, Baitui PE7920, Baitui PE7980, etc.
First sight
In terms of cost performance, the Changdi brand is more outstanding and has good versatility.
For another example, Heidegger is more willing to spend money on temperature control.
I can’t finish it in one or two sentences, so I recommend you read an article, which is very detailed from principles to parameter comparison to model recommendations.
2021 Air Frying Oven | Air Fryer and Oven All-in-One Purchasing Guide