What is the difference between the first and second generation Audi 80?

I'm looking to buy an Audi 80 but I'm confused about the different generations. Can someone explain the differences between the first and second generation models and what to look out for?

The first generation Audi 80, also known as the B1, was produced from 1972 to 1978 and had a boxier, more angular design.

The second generation Audi 80, also known as the B2, was produced from 1978 to 1986 and had a more rounded and aerodynamic design.

When buying a second generation Audi 80, make sure to check for common issues such as rust on the wheel arches and bubbling on the paint. It's also a good idea to get a pre-purchase inspection to ensure the car is in good condition.