If you want to know the spec of each of the models the printed A3 and S3 Price List seems to give more detail than the 'configurator' You can download a copy from the A3 screens on the Audi UK website
For the Hatchbacks go to: https://www.audi.co.uk/new-cars/a3/a3-sportback.html.
For the Saloon models go to: https://www.audi.co.uk/new-cars/a3/a3-saloon.html
For the Cabriolet model go to : https://www.audi.co.uk/new-cars/a3/a3-cabriolet.html
For the Hatchbacks go to: https://www.audi.co.uk/new-cars/a3/a3-sportback.html.
For the Saloon models go to: https://www.audi.co.uk/new-cars/a3/a3-saloon.html
For the Cabriolet model go to : https://www.audi.co.uk/new-cars/a3/a3-cabriolet.html