What is the difference between Audi A1 and A2?

I've been looking into Audi cars and can't seem to understand the difference between the Audi A1 and A2 models. They both seem very similar in terms of size and features. Can someone explain the main differences between these two models?

The main difference between the Audi A1 and A2 is their engine size and power. The Audi A1 is equipped with a smaller, more efficient engine, making it better for city driving and fuel economy. On the other hand, the Audi A2 has a larger, more powerful engine, suitable for those who want a sportier driving experience.