What is the difference between the Audi A6 55 TFSI Quattro and the A6 55 TFSI E Quattro?

I am looking to purchase an Audi A6, but I am not sure what the difference is between the 55 TFSI Quattro and the 55 TFSI E Quattro. Can someone please explain?

The A6 55 TFSI Quattro and A6 55 TFSI E Quattro also have different levels of performance. The E Quattro has a combined horsepower of 362, while the regular Quattro has 335. However, the E Quattro has a higher torque output due to the electric motor.

One important factor to consider when deciding between the A6 55 TFSI Quattro and A6 55 TFSI E Quattro is fuel efficiency. The E Quattro can achieve an estimated 27 MPG combined, while the regular Quattro only gets 25 MPG combined. This may not seem like a significant difference, but it can add up over time.