What is the difference between the Audi A3 30 TFSI and 35 TFSI models?

I'm considering purchasing an Audi A3 but I'm confused about the different TFSI models. Can someone explain the differences between the 30 TFSI and 35 TFSI?

The main difference between the two TFSI models is the power output. The A3 30 TFSI has a 1.0-liter 3-cylinder engine, while the A3 35 TFSI has a 1.5-liter 4-cylinder engine. The 35 TFSI also has more torque and a slightly higher top speed.

In terms of fuel efficiency, the A3 30 TFSI has a combined MPG of 50.4, while the A3 35 TFSI has a combined MPG of 44.8. So if you're looking for better fuel economy, the 30 TFSI might be a better choice.