What is the difference between the Audi A8's 3.0L TFSI and 4.0L TFSI engines?

I'm trying to decide which engine to go for in my new Audi A8, but I'm not sure what the main differences are between the 3.0L and 4.0L TFSI engines. Can someone explain the key distinctions to me?

The main difference between the 3.0L and 4.0L TFSI engines in the Audi A8 is the displacement and power output. The 3.0L engine has a smaller displacement of 2995 cc and produces 335 horsepower, while the 4.0L engine has a displacement of 3996 cc and produces 453 horsepower.