What is the difference between the Audi A2 TDI and FSI engines?

I am considering buying a used Audi A2 and I see that there are two different engine types available: TDI and FSI. What are the differences between these two engine types and how do they affect the performance and reliability of the car?

If you prioritize a quieter and more refined driving experience, the FSI engine may be a better choice as it produces less noise and vibration compared to the TDI engine.

The TDI engine is a turbocharged diesel engine while the FSI engine is a direct injection gasoline engine. This means that the TDI engine offers better fuel efficiency and torque, while the FSI engine provides smoother and more responsive acceleration.

In terms of reliability, the TDI engine is known to be more durable and long-lasting compared to the FSI engine. However, proper maintenance and regular oil changes can greatly contribute to the longevity of both engine types.