Avoid all reference errors and consider the same duck leg.

The energy source is the same. Under the same energy source, it is obviously higher to add a box lunch.

Roasted duck leg is more fat and greasy after eating. The main reason is that its internal fat is cracked under barbecue, which makes its fat part easier to be absorbed by the body than ordinary duck leg.

To sum up, a set of duck leg rice is higher from the heat point of view, and roast duck leg is higher from the material absorption point of view.