What is the difference between the Audi A8 TFSI and TDI engines?

I am trying to decide between the Audi A8 TFSI and TDI engines but I am not sure what the difference is between the two. Can anyone explain?

The main difference between the Audi A8 TFSI and TDI engines is the type of fuel they use. The TFSI engine uses gasoline while the TDI engine uses diesel. The TFSI engine is typically more powerful and responsive, while the TDI engine offers better fuel efficiency and torque.

Another important difference is the technology used in the engines. The TFSI engine utilizes direct fuel injection and a turbocharger, while the TDI engine uses a common rail fuel injection system. These differences can affect performance and fuel economy.