The main difference between afternoon tea and dinner at McDonald's lies in the time and the contents of the set meal.

1. Time: McDonald's tea time is usually from 14:11 pm to 17:11 pm, while dinner time starts from 17:11 pm and ends at 21:11 pm.

2. Set meal: McDonald's afternoon tea set meal usually includes refreshments and drinks, such as chicken with crispy wheat sauce, half chicken with green pepper flavor, Chinese fries, etc., while dinner offers more choices of set meals, including Big Mac value-added dinner, double cheeseburger value-added dinner, rare wheat spicy chicken leg burger value-added dinner, etc., covering a variety of combinations such as hamburgers, French fries and drinks.

to sum up, the main difference between afternoon tea and dinner at McDonald's lies in the time and the package content. Afternoon tea mainly consists of refreshments and drinks, which is suitable for refreshing in the afternoon; Dinner, on the other hand, offers a wider selection of packages, which is suitable for enjoying a delicious dinner in the evening.