First, goods are perishable in a food industry. So, it will require a lot of planning to order the right amount, so that you do not lose money. This is something unique to the food industry.
Second, service in the food industry is complicated by the type of business. For example, if you open a high end restaurant, you will need a certain type of staff that fits into the ethos of the place. Also unlike goods, there is no self-life for good staff.
Third, another difference with goods is that the prices will fluctuate depending on the season. This is not something that you have to worry about with services.