What are the differences between the Audi A8 55 and 60 TFSI models?

I'm looking into buying an Audi A8 and I'm having trouble understanding the differences between the 55 and 60 TFSI models. Can someone explain the technical details and what makes one a better choice?

The main difference between the Audi A8 55 and 60 TFSI models is the engine size and power. The 55 TFSI has a 3.0-liter six-cylinder engine with 335 horsepower, while the 60 TFSI has a 4.0-liter eight-cylinder engine with 453 horsepower. If you're looking for a more powerful and responsive drive, the 60 TFSI may be a better option.

In addition to the engine, the 60 TFSI model also comes with a longer list of standard features, such as the 19-speaker Bang & Olufsen sound system and massage functionality for the front and rear seats. If these luxury features are important to you, the 60 TFSI model would be the way to go.