What are the differences between the Audi A3 TFSI and TDI engines?

I'm trying to decide between the TFSI and TDI engines for my new Audi A3. What are the main differences between these two engines in terms of performance, fuel efficiency, and overall driving experience? I am looking for technical details and personal opinions from drivers who have experience with both options. Thank you.

Overall, the TFSI engine is known for its excellent performance and responsiveness, while the TDI engine is more fuel-efficient and pulls better at low speeds. If you prioritize power and acceleration, go for the TFSI. But if you want better fuel economy and smoother low-speed driving, the TDI may be a better choice.