What is the difference between S line and S models in the Audi A4?

I'm considering purchasing an Audi A4 and noticed there are both S line and S models. What are the major differences between these two options and how do they impact the overall driving experience?

The main difference between S line and S models in the Audi A4 is the level of performance and sports styling. S line adds a sportier look to the exterior and interior of the vehicle, while S models provide a more powerful engine and enhanced driving dynamics.