This is purely a matter of personal taste. Buying two separate appliances is not only more expensive, but it also takes up a lot more room to fit an air fryer and a toaster oven in your kitchen. You should consider how frequently you'll use the toaster oven component. If you think you'll just use it once in a while, you'd be better off concentrating your efforts on selecting the finest air fryer. Another advantage of combination units is that many of them have a range of extra cooking techniques. It's all about figuring out what's best for you.