Why do Audi A4 cars have different versions for different markets?

I have noticed that some Audi A4 cars have different specifications depending on the country they are sold in. Why is this the case and how does it affect the overall performance and value of the car?

According to Audi, they have different versions for different markets due to varying regulations and customer preferences. For example, in some countries, certain safety features may be required by law, while in others, customers may prioritize luxury options over performance.