For two or three people, it doesn't make much difference whether to choose a set meal or order a meal according to how much each person spends. The package may be a little more expensive, but the overall difference is not big. So, in this case, you can choose any way to order food.
But for a large number of people, the package may not be enough to meet the demand, and it may be more cost-effective to order according to how much each person spends.
Generally speaking, the choice of ordering method depends on the number of people and the actual situation, and can be decided according to the specific situation.