The differences between Diet Coke and Coke Zero are: different launch times, different mottos, and different artificial sweeteners.

1. Different launch times

1. Diet Coke: Diet Coke was first launched in the German market in 1995.

2. Coke Zero: Coke Zero is a product launched by The Coca-Cola Company in 2005.

2. Different mottos

1. Diet Coke: Diet Coke’s motto is “As delicious as always.”

2. Coke Zero: Coke Zero’s motto is “Real Coca-Cola taste with 0 calories.”

3. Different artificial sweeteners

1. Diet Coke: The artificial sweetener in Diet Coke is aspartame.

2. Coke Zero: The artificial sweeteners in Coke Zero are aspartame and acesulfame potassium.

Baidu Encyclopedia - Diet Coca-Cola

Baidu Encyclopedia - Coca-Cola Zero