What is the main difference in ingredients between Big D Tea and Long Island Iced Tea?

The main difference in ingredients between Big D Tea and Long Island Iced Tea lies in the addition of Grand Marnier to Big D Tea. This liqueur adds a distinct orange flavor and sweetness to the drink, setting it apart from the classic Long Island Iced Tea, which typically consists of a specific mix of spirits including vodka, gin, rum, tequila, and triple sec, but does not include Grand Marnier. The presence of this additional ingredient in Big D Tea enhances its flavor profile and distinguishes it from the more straightforward composition of a Long Island Iced Tea.